Britney Spears is set to perform at the 2009 Teen Choice Awards. The "Womanizer" singer - who is nominated in three categories - will appear on stage at the annual event on Sunday night at Universal City's Gibson Amphitheatre, in California.

Her performance will mark 10 years since the first Teen Choice Awards in 1999, where Britney - who is currently on a break from her world tour - was one of the performers.

Jordin Sparks routines are so energetic they leave her "drenched" with sweat. The "Battlefield" singer - who shot to fame after winning U.S. TV talent show "American Idol" in 2007 - credits her support slot on The Jonas Brothers' tour for helping her lose weight.

She explained: "I'm literally drenched every night when I get off the set because the stage for this world tour I'm on is so massive. I'm constantly moving."

Kevin Jonas has got engaged. The Jonas Brothers singer proposed to girlfriend Danielle Deleasa Wednesday after he turned up on her doorstep and got down on one knee.

Speaking about Danielle's reaction: "She said yes, yes, yes like 500 times super fast in a row."

Nick Jonas has graduated from high school. The 16-year-old Disney pop star announced the news on the Jonas Brothers' Twitter blog.

He wrote: "I'm happy to announce I have graduated! Class of '09! Congrats to everyone else who has also graduated this year! Mr. President (Nick)."