Here's one lesson Usher probably wouldn't want to teach Justin Bieber.
TMZ reports that the R&B star (and teen popstar's mentor) is the subject of a sex tape being offered for sale in Hollywood. The website claims to have seen snippets of the tape, as well as a few still images from it, and confirm that it is indeed Usher, and ex-wife Tameka Foster, in the video.
In December 2010, the star, real name Usher Raymond IV, reported $1,000,000 in valuables, mostly jewelry and two laptops, stolen from his SUV in Atlanta. TMZ says that sources close to the star claim that, if the tape is indeed his, could have been taken during that robbery.
The tape, if it does feature the Raymond and his ex-wife, would probably have to be a number of years old; the singer filed for divorce from Foster in June, 2009. Raising two young children in a dissolved marriage, Naviyd and Usher Raymond V, the star says he is now friends with his ex-wife as they work to make good decisions for their kids.
Recently, Usher announced he donated payment he received for performing for members of Libyan dictator Muammar Gaddafi's regime to Amnesty International.
For more on the sex tape, click over to TMZ.