Brad Paisley has some wise words for fans: Don't ever lose a bet to a rapper because it can get expensive.

The singer posted a short video to Facebook on Sunday warning his fans against bets with rappers. In the video, Brad shows a bottle of what appears to be alcohol. Then fellow "Rising Star" judge and rapper Ludacris appears making a joke about filling the bottle with Hennessy.

Turns out that Brad was right about losing a bet to a rapper being expensive. The bottle Brad showed was a $2800 bottle of Remy Martin Cognac Louis XIII.

According to Wikipedia, the cognac is aged oak barrels that are several hundred years old and placed in its own cellar. Brad did get off pretty easy, though, as Wikipedia does say that soe bottles of the Louis XIII cognac can go for as high as $44,000.