Hot mama! Fergie flashes her booty in leather leotard at concert

Fergie's pert posterior stole the show at her own show on Wednesday night. The 41-year-old singer performed her new track "M.I.L.F. $" during The Creative Coalition's Benefit Gala in Philly -- and it's safe to say nobody was able to take their eyes off of her as she showed off her smooth moves in a skintight leather leotard.

Fergie rocked the sexy leotard, which featured a plunging sweetheart neckline, with a silver, sparkling jacket and a set of over-the-knee leather boots. When the former Black Eyed Peas frontwoman turned around, she showed off the skimpy back of her leotard and the boots' scandalous lace-ups.

And all we have to say to that is -- if you've got it, flaunt it. It's nice to see the mother of son, Axl, out performing again after a brief hiatus from music.

The "Big Girls Don't Cry" singer is currently on tour with concerts coming up in both Los Angeles and Tokyo.