‘Lovestoned’ star Justin Timberlake has been putting Timbaland’s set Futuresex/Loveshow set to good use. Star Magazine claims the former N’Syncer uses the half-hour show break to do the horizontal mambo with GF Jessica Biel.

On September 18th, Jess and Just enjoyed a quickie before Justin hit the stage again. Justin came out and announced it to his friends hanging backstage, Star claims.