Levi Johnston and Brittani Senser's on-screen chemistry in her upcoming music video has spilled into real life, RadarOnline.com has exclusively learned.

They recently spent the weekend together in Los Angeles, and only we have pictures from their hot hook-up.

PHOTOS: Levi Johnston & Brittani Senser Have A Love Connection In L.A.

Bristol Palin's ex-boyfriend and baby daddy plays Brittani's love interest in the video for her new song, After Love, and their scenes together are described as nothing less than "steamy."