(Cover) - EN Showbiz - Justin Bieber and Selena Gomez "showed off" on the dance floor.

Despite the couple performing at two separate New Year's parties they still managed to snatch some quality time together.

The couple were spotted at Justin's private party at the Glass House following his performance on Dick Clark's New Year's Rockin' Eve with Ryan Seacrest.

The young pair were clearly in the party spirit and boogied at the event until three in the morning.

"He danced with Selena, showing off, picking her up and swinging her around like it was Dancing With the Stars," a source told E!

Justin also hopped in to the DJ booth to play his new tune with Jaden Smith, appropriately titled Happy New Year.

Justin displayed his musical talents earlier on in the evening. During the New Year's show he played the piano and sang The Beatles classic Let It Be. Legendary musician Carlos Santana arrived on stage to accompany him on guitar.

Also performing on the night were Lady Gaga, Pitbull, Drake and Cee-Lo Green.

Lady Gaga was selected by Mayor Bloomberg to begin the iconic crystal ball dropping in Times Square. The star wore a sequinned mask and shared a quick kiss with the mayor at the momentous event.

Meanwhile, Selena performed for MTV's NYE in NYC also at Times Square. She sang her hits Love You Like a Love Song and Hit the Lights in a plunging sequinned dress.

"Hope everyone had a great New Year's Eve. Here's to a great 2012 for all!" she Tweeted. (C) Cover Media