It all went down on Oct. 10 when Sel was performing at her concert and singing her hit song "Slow Down". From what we can see in the audience-taped footage, Sel tripped up on her foot as she was jumping up and down during her dance routine and fell down pretty hard.
Like a pro, Selena hopped back up and kept dancing and singing after her fall. It didn't go unnoticed though! A back up dancer stepped off the stage to assist and help her up. Embarrassing!
Watch the whole incident go down in the video above. Jump to the 3:20 mark to see her fall down!
Selena isn't the only star to bust her butt on stage. Click here to watch Carrie Underwood's recent, nasty on-stage spill!
Gallery | Strange (And Crazy!) Stuff at Concerts