London, Jan 03 : Fergie gave fans an eyeful when she performed in Las Vegas on New Year's Eve in a bum-skimming dress.

The singer gyrated on stage with plenty of tanned thigh on display.

Fergie, who had gained weight for her role in `Nine', has been working out to look perfect for her wedding day.

"It's hard. I've been working out every day," The Sun quoted Fergie, as telling People magazine.

Fergie is all set to tie the knot with Hollywood actor Josh Duhamel on the January 10. (ANI)