White hot! Janet Jackson shows off a bit too much cleavage last night!

She's been a yo-yo dieter all her adult life, but Janet Jackson says she finally has a handle on her ideal weight.

And she certainly looks like a woman who is at ease.

Last night she arrived at amFAR's Cinema Against AIDS annual ball at Cannes in a stunning bright white Pucci by Peter Dundas gown that showed off her slim, toned frame.

Vision in white: Janet Jackson looked incredible for amfAR's Cinema Against AIDS 2012 event in Antibes last night

Perfection: Janet's Pucci was tweaked and coaxed into place on the white carpet

Rocking it out: Jackson was stunning i her simplicity, showing off her newly svelte figure