It had to be pop stars Rihanna and Miley Cyrus.

Whenever there is a glamorous 'do these days in the United States, you half-expect the two singers to show up for it in outfits that would start tongues wagging - and you will often not be disappointed.

So it was that at amfAR The Foundation for Aids Research's fifth annual Inspiration Gala in Los Angeles, they once again showed off an expanse of flesh.

Check out the photos below.