By Leah Ornstein – Radar Style & Beauty Editor

Justin Timberlake is one lucky guy.  Over the years, the former boy-bander has gotten up close and personal with some of the sexiest Hollywood stars – both on and off the screen! 

PHOTOS: Justin Timberlake’s Sexiest On-And-Off Screen Ladies

RadarOnline.com has photos of the Bad Teacher star’s hottest leading ladies, stripped down into the skimpiest of bikinis, in this special photo feature. 

Justin’s first co-star was also his first Hollywood romance!  Years after his run on The Mickey Mouse Club, the singer reunited with fellow Mouseketeer Britney Spears, and the two became one of the hottest couples to ever top the Billboard charts. 

PHOTOS: Bikinis!  Summer’s Hottest Beach Bodies

After the two split, he was immediately linked to Jenna Dewan (the now Mrs. Channing Tatum) and also Charmed star Alyssa Milano. 

PHOTOS: Sexy Celebs Who Have Good Taste In Bikinis And Bad Taste In Boys

Sexy costars of the superstar’s include Jessica Alba, Jessica Simpson, Anna Faris, Jessica Simpson, and of course, his Bad Teacher costar and ex-galpal Cameron Diaz!

PHOTOS: Cameron Diaz’s Rocking Bikini Body Over The Years

What other sexy stars have been linked to Justin Timberlake?  Click here to find out.