Austin Mahone Flashes Abs on Stage at Sunfest 2014

Austin Mahone pulls up his shirt on stage during the 2014 SunFest on Sunday afternoon (May 4) in West Palm Beach, Fla.

The 18-year-old singer wore an eye-popping multi-color shirt to the annual festival where he performed for a packed crowd.

PHOTOS: Check out the latest pics of Austin Mahone

“Watch @MTV tomorrow starting at 10am to learn #100Things about me & tweet #100Things to unlock a little song i wrote,” Austin tweeted just a few days before.

In case you missed it at all, watch “100 Things” with Austin below!

10+ pics inside…