She is one of the music world's biggest names, so it was no wonder that Britney Spears was in attendance at the iHeartRadio Festival on Saturday (September 21) in Las Vegas.

The "Baby One More Time" singer showed off her fabulous figure in an all black ensemble as she waited to head out on stage to introduce Miley Cyrus' performance.

Backstage, the two pop stars embraced and chatted before Miley's turn at the Vegas bash.

Beyond the weekend meeting, the duo will be collaborating on a song for Cyrus' new album Bangerz.