Katheryn Elizabeth "Katy" Hudson, better known by her stage name Katy Perry, is an American award-winning recording artist, businesswoman, philanthropist, and actress from Santa Barbara. She is also the first female artist to have 5 number one singles on the U.S. Billboard Hot 100 from one album, (Teenage Dream) and the second artist to accomplish such a feat (the first artist being Michael Jackson with his 1987 album Bad)

In 2007, Perry signed a recording contract with Capitol Records and adopted her current stage name. 

The following year, she came to prominence with the June 2008 release of her second album, One of the Boys, which produced the singles "I Kissed a Girl", "Hot n Cold", "Thinking of You", and "Waking Up in Vegas". The project was further promoted through the Hello Katy Tour. In November 2009, she released a live album titled MTV Unplugged, which features performances of several tracks from One of the Boys. Perry's third record, Teenage Dream, was released in August 2010 and spawned the Billboard Hot 100 chart-topping singles "California Gurls", "Teenage Dream", "Firework", "E.T.", and "Last Friday Night (T.G.I.F.)". In doing so, it became the first album recorded by a female artist in history to produce five number-one hits, and the second album overall after Michael Jackson's August 1987 album Bad. Perry embarked on the California Dreams Tour following its release. In March 2012, Teenage Dream was re-released as Teenage Dream: The Complete Confection and produced the number-one single "Part of Me". Her fourth album, Prism, was released in October 2013 and contains the Billboard Hot 100 number 1 single "Roar". 

Katy Perry's lyrical wit has been likened to that of British female soloists Lily Allen and Kate Nash. However, her music is closer to the pop-rock of Avril Lavigne. The elements add up to a spunky, sassy approach uniquely Katy Perry.

For more Detials : Kate perry Officical Site

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International R&B star Rihanna released her first album in 2005 and is known for such hits as "Umbrella," "Pon de Replay," "SOS" and "Disturbia."

Singer Robyn Rihanna Fenty was born on February 20, 1988, in St. Michael Parish on the Caribbean island of Barbados. She is the eldest of three children born to Monica Fenty, an accountant, and Ronald Fenty, a warehouse supervisor. Rihanna's childhood was marred by her father's struggles with addictions to alcohol and crack cocaine and her parents' marital problems—they divorced when she was 14 years old.

However, since that time, Rihanna's father has managed to conquer his addictions and the pair are now very close. "Now my dad is like the coolest person on the planet," Rihanna says. "He doesn't smother me. He lets me live my life. And he's been like that a lot, even when I was younger. He would watch me making a mistake and he wouldn't stop me. My dad, he lets me make it and then I learn."

Rihanna also struggled with crippling headaches for several years during her childhood, a condition she attempted to hide from her friends and classmates so that they would not think she was abnormal. "I never expressed how I felt," she remembers. "I always kept it in. I would go to school ... you would never know there was something wrong with me."

In 2009, Rihanna again made headlines again, becoming the center of a media firestorm after a domestic violence incident in which her then-boyfriend Chris Brown assaulted her before an awards show. The incident sparked a huge public outpouring of support for Rihanna, and she has since become a spokesperson against domestic violence. "This happened to me," she said in an interview with Diane Sawyer. "It can happen to anyone."

Rihanna was later romantically involved with Los Angeles Dodgers outfielder Matt 
Kemp, but the pair have since split ways.

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Justin Bieber is a Canadian pop star who was discovered via YouTube. His debut album, My World, went platinum in the United States, Canada and the United Kingdom.

Born in 1994 in Stratford, Ontario, Canada, to a single mother, Justin Bieber took second place in a local talent competition at a young age and later turned into a YouTube phenomenon. He signed a record contract with Usher and became the first solo artist to have four singles enter the Top 40 before the release of a debut album. His record "My World" has gone platinum in several countries. He lives and works in Atlanta.

Bieber's first single, "One Time," went certified platinum in his native Canada shortly after its release in May 2009. His album My World matched that success, selling more than 137,000 copies within a week of hitting stores. Bieber broke into the Billboard Top 10 in early 2010 with "Baby," which also featured Ludcris. Bieber soon released My World 2.0 (2010), which offered his growing fan base ten new songs.


In 2011, Bieber took to the big screen in the concert documentary Never Say Never. His fans crowded movie theaters to catch him in action on stage and get a glimpse of his life behind the scenes. The movie, which eventually earned more than $73 million at the box office, also had guest appearances by Kanye West, Miley Cyrus and Bieber's musical mentor Usher. That same year, Bieber released an album featuring his own take on such holiday classics as "All I Want For Christmas Is," his duet with Mariah Carey.

Teen idol Justin Bieber broke the hearts of many of his young female fans in 2010 when he started dating television actress and singer Selena Gomez. It hasn't been easy for Gomez to be Bieber's girlfriend. She has been accosted by some of his devoted followers. There were even death threats against her posted on Twitter after the pair was photographed kissing while on vacation in 2011. The couple ended their relationship in November 2012.

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Lady Gaga was born as Stefani Joanne Angelina Germanotta on March 28, 1986 in Yonkers, New York. She attended New York University's Tisch School for the Arts but left to find creative expression. She wrote songs for other artists until being discovered by R&B singer Akon. Her debut album, The Fame, was a huge success, and the single "Poker Face" topped charts in almost every category, in almost every country.

Early Life

Stefani Joanne Angelina Germanotta was born on March 28, 1986 in Yonkers, New York, to Cynthia and Joseph Germanotta. Germanotta, now known as Lady Gaga (she has attributed the inspiration for her name to the Queen song "Radio Ga-Ga"), went on to become an international pop star.

In 2005, Lady Gaga was briefly signed by Def Jam Records, but was dropped just months later. Being dropped by the label propelled the singer to perform on her own in clubs and venues on New York City's Lower East Side. There, she collaborated with several rock bands, and began her experimentation with fashion.


Lady Gaga's debut single, "Just Dance," was released to radio in early 2008, and received both popular and commercial acclaim. The song was then nominated for a Grammy Award (for best dance recording) in 2008. The song lost to Daft Punk's "Harder, Better, Faster, Stronger," but this didn't keep Gaga from reaching No. 1 on the mainstream pop charts in January 2009. The second single off of The Fame, "Poker Face," earned Gaga even more success. The song topped singles charts in almost every category, and in almost every country. Both songs were produced by Akon's affiliate RedOne, who co-wrote most of Lady Gaga's album.

Later in 2008, Lady Gaga opened for the newly reformed New Kids on the Block. She also collaborated with the group on the song "Big Girl Now" from New Kids on the Block's album The Block. The following year, Gaga released an album of eight songs, The Fame Monster, followed by 2011's Born This Way.

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