After rocking the stage at the ‘2012 Grammy Awards’ it was time for the biggest stars of the night to REALLY let their hair down!

And no one knows how to shake up Hollywood quite like Rihanna!

Slipping out of her full-length black gown for a black and white mini with thigh high boots, the Bajan beauty led the way, hitting up both the House of Blues and then Greystone Manor nightclub.

And from the sounds of it, she found the perfect partner to keep up with her party-loving antics!

According to PopCrush, RiRi, who was spotted smoking a suspicious substance in Hawaii last month, has been caught at it once again – but this time she was joined by the Foo Fighters’ Dave Grohl

The music pair’s apparent naughty behaviour was outed by fellow party-goer DJ Diplo, who tweeted,

"Smokin a doobie at the folkways records afterparty with rihanna and dave grohl."

Meanwhile, lady of the moment Adele was celebrating more than winning six trophies on the night!

The Brit superstar was also thrilled to show off her new fella Simon Konecki at the couple’s first public event.

“I’m madly in love,” she told US news show 60 Minutes of the charity entrepreneur, who was suited and booted in a tux for the occasion.

But one music star who may have partied a little TOO hard after the 54th annual awards bash was P Diddy!

Just hours after boasting on Twitter, “This is actually one of the HOTTEST parties I've ever thrown!! Right now at the Playboy Mansion!!!!” the hip hop mogul was reportedly rushed to hospital.

According to TMZ, the rapper suffered an “extreme migraine” after returning home from the post-Grammy do and was taken to the emergency room at UCLA hospital, where he was treated and then later released.

Copyright : MTV Australia