Brett Eldredge promised to sky dive if his his song "Don't Ya" hit Number One - and it did!  So he strapped on a parachute and jumped out of a plane.

And now, he says if his latest single "Beat of the Music" tops the chart he'll go swimming with SHARKS.  I'm sorry, what?!?!

He says, "I can't believe I actually might go shark diving. The song's climbing the charts and the more I sweat every day.  But I'll be all right with trying it out."

Thankfully he'll be in a cage!  He says, "I'm gonna get a cage, though.  I need a cage, so if you all know anybody who has a shark cage I could borrow, that's fine.

"I'll get in there and they can throw all sorts of dead fish around there and let them swim up to the cage for like five minutes and then get me out of there and I'll need like 20 drinks."

And although Brett's bets are getting him publicity, he adds, quote, "I never was going to make any of these bets public, and they just started to become public."

As I'm writing this, "Beat of the Music" is #13 on the charts!  Good luck Brett!  With the song, and with sharks.

Photo by Rick Diamond/Getty Images for Country Thunder