Lady Gaga also performed at the first annual iHeartRadio Music Festival that was held at the Las Vegas’ MGM Grand in Las Vegas, Nevada over the weekend. The first iHeartRadio Music Festival has since been dubbed “the biggest live music event in radio history.”

Gaga performed a medley of her hits to her fans which included “You and I,” “Judas,” “Just Dance,” “Poker Face,” “Lovegame,” “Paparazzi,” “Alejandro,” and more. She did put on a show for her fans, she also performed in a duet with Sting and she also performed “Hair” which she dedicated to 14-year-old Jamey Rodemeyer, who recently committed suicide after being bullied.

Jennifer Lopez was booked and performed at the iHeartRadio Festival that was held at the Las Vegas’ MGM Grand in Las Vegas, Nevada over the weekend. The festival is a two-day event that was put together to celebrate the launch of the new I Heart Radio application. In addition to JLo, other famous faces that performed at the festival includes Jay-Z, Coldplay and Kelly Clarkson who performed the first night and Lady Gaga, Kenny Chesney and Jennifer Lopez for the second night.

Check out the photos of JLo at the I Heart Radio Festival Las Vegas, she was dressed like a Las Vegas showgirl too. As they say what happens in Las Vegas stays in Las Vegas.

I am guessing that by now you all should have heard that Kim Kardashian will soon be known as Mrs. Kim Humphries and should have already gotten the name change. The reality star recently say goodbye to her Bachelorette status at her Bachelorette Party that was held at the TAO Nightclub in Las Vegas.

The big-booty Bride-to-be was spotted at her party, even her mother was there to help her say goodbye to her surname, we also hear that she crashed Kris Humphries bachelor party later that night. Check out the photos of Kim Kardashian Bachelorette Party in Las Vegas.

Britney Spears made a grand appearance of which you could call a secret mini-concert at the Palms Casino Resort’s Rain Nightclub in Las Vegas Friday, performing three tracks from Femme Fatale. Britney performed three songs during the mini-concert at the Rain nightclub – “Hold It Against Me,” “Big Fat Bass” and “Till the World Ends.” During “Bass,” Brit can be seen climbing up and down various props and sitting down on boxes. It was not alot of choreography for the concert, but it was her first public performance since her Circus tour in 2009, Spears was cheered on at the concert by boyfriend Jason Trawick and father, Jamie Spears, among other excited fans. Her new album Femme Fatale will be released next week. Congrats to Brit for coming back on the scene for her fans to enjoy her music once again!