Ricky Martin closed out a brief Las Vegas residency on Saturday, and he surprised everyone by FINALLY performing “She Bangs” with former “American Idol” superstar WILLIAM HUNG. It was their first live duet.

There isn’t a high-quality video of this, but William has a brief clip on Instagram. Unfortunately, he doesn’t sing much . . . he must have gotten more shy with age.

Remember his Idol audition?