Rihanna is planning a big ''surprise'' for Chris Brown's birthday.

The 'Diamonds' singer wants to prove her love for the 'Yeah 3x' hitmaker and plans to go all out to help him celebrate turning 24 on May 5.

Christina Aguilera, Selena Gomez, Pitbull, The Band Perry and Macklemore & Ryan Lewis will perform at the 2013 Billboard Music Awards.

They will join previously announced performers including Taylor Swift, Bruno Mars, Miguel, Prince and Justin Bieber at the annual music event, which will take place at the MGM Grand Garden Arena in Las Vegas on May 19.

Rihanna has told Katy Perry she wants her to ''spank'' her bottom.

The 'Firework' hitmaker took to Twitter to quiz her friend on why she wasn't invited to the King of Diamonds Gentleman's Club on Saturday night (20.04.13) after she saw the saucy snaps of Rihanna cavorting with the strippers.

Rihanna partied with NFL players at a pre-draft bash.

The 'Stay' hitmaker once again proved her partying credentials when she hit the Greenhouse club in New York City on Tuesday (23.04.13) with some of the biggest names in American sport.

Aerosmith and PSY will perform live at the inaugural Social Star Awards in Singapore next month.

The 'Don't Want To Miss A Thing' rockers and other performers, including Cee Lo Green and Asian girl group Blush, will take to the stage at the world's first social media awards and also at a post-ceremony concert for fans called 'The Singapore Social'.

Rihanna spent $8,000 on strippers last weekend.

The 'Where Have U Been' hitmaker dropped by Miami's King of Diamonds strip joint last Saturday night (20.04.13) to see how the girls danced to her music and ended up staying at the bar for several hours, TMZ reports.