Justin Bieber isn't the only one with great fashion sense -- Joe Jonas knows how to get down in style, too. The heart-throb Jonas, as he's officially known, came dressed to the nines for the Saks Fifth Avenue FNO event on Sept. 8, where he laid down his latest single, 'Just in Love,' for the fashion-forward crowd.

Like a budding Timberlake, Jonas danced around the stage, strutting his sex appeal and gripping the mic with confidence as he performed his brand new hit song in a tie-less black suit. His appeal was not lost on the mixed crowd, though based on the video below, they didn't seem to be as excitable as his typical teen pop audience.

We'll say one thing, and that's that Jonas knows how to stir up the ladies. So far, the middle Jonas has dropped three teaser clips for his forthcoming 'Just in Love' music video, and though they amount to about a minute of clips, we still don't know much about what's coming ... Other than Jonas' obvious desire to drop the whole purity act, as proven by teaser No. 1, which shows him in bed with a young woman.

The 'Just in Love' music video will premiere in full on Monday, Sept. 12 at 7PM on E!, but until then, we'll just have to settle for the shaky live version from Saks.

Watch Joe Jonas Perform 'Just in Love' at the Saks Fifth Avenue FNO Event