Kellan Lutz recently returned to his modeling roots, stripping down and striking a pose alongside Adam Levine's smoking hot bikini model gal pal Anne V - and RadarOnline.com has all the smoking hot photos.

The Twilight hunk, who recently split up from on-again-off-again girlfriend AnnaLynne McCord, is the new face of the Dylan George and Abbot + Main by Dylan George Fall 2011 campaigns - and also co-designed the Abbot + Main collection with the brand's founder Danny Guez.

Hollywood's hottest stars know that one the secret of keeping any romance alive is by engaging in splashy displays of public affection, whenever and wherever they can! RadarOnline.com has photos of your favorite celeb couples, getting busy in front of a live audience, and sometimes crossing the line. Click the next sentence to see stars engaging in PDA.

PHOTOS: PDA Alert!  Touchy-Feely Stars Who Are Not Shy Showing Their Love

Paris Hilton has never missed a chance to show off her scandalous bikini body -- or her latest boy toy. The blonde babe most recently got busy with Cy Waits in Maui this holiday season, presenting her hunky beau the gift of her love. See Paris getting busy on the beach with Cy by clicking here.