Robin, Leona, Mel or Natasha Who'd You Rather?

3/16/2010 4:10 PM PDT

Robin, Leona, Mel or Natasha: Who'd You Rather?

Pussycat Dolls founder Robin Antin, 48, Leona Lewis, 24, Mel B, 34, and Natasha Bedingfield, 28, all showed up to the same event in Vegas the other day.

Question is ...