Wham, Bam, Thank You Pam!

4/13/2007 1:08 PM PDT BY TMZ STAFF
PETA princess Pamela Anderson put some sexy clothes on and actually did something with her hair -- and from the look of it ... it's workin'!

The former "Baywatch" superbabe proves that at 39, she knows how to clean up and still look bangin'.

Maybe the sexafication is because Tommy Lee is back in the picture.