Every year, the most popular radio station in Los Angeles, 102.7 KIIS FM, puts together a day-long concert, which includes some of the biggest musical acts and guests.

Compared to 1998, the line-up has changed quite a bit - when the event first took place on June 13 at the Edison International Field of Anaheim, musical guests included Will Smith, N*SYNC, Mariah Carey, Olivia Newton-John and Hootie and the Blowfish.

This year, the event was held on May 14 at the Staples Center and included American Idol semi-finalists, Selena Gomez, Ke$ha, special guest host Britney Spears, Jennifer Lopez, Pitbull, T-Pain, Jason DeRulo, and many more. Talk about a line-up - I wish all these artists could make their way to east Texas sometime soon!Here were some of the performances from last Saturday:

Ke$ha - We R Who We R

Jennifer Lopez ft. Pitbull - On The Floor

Jason DeRulo - In My Head