The underboob returns: Can it rival the supreme sideboob? !

As Rihanna lets it all hang out, here's our gallery of stars going, er, under the top

Trailblazer ... Rihanna revives the underboob at this weekend's Wirless Festival

CELEBRITIES can’t resist a game of peekaboob — but until now, they've been content to stick with a bit on the side.

We reported last month that our female stars are obsessed with the sideboob — with everyone from Nicole Scherzinger to Cheryl Cole flashing a cheeky glimpse.
But it seems serial side-boober Rihanna is getting bored with the all-too-common trend and has decided to revive the sideboob’s trashier cousin — the underboob.
The trailblazing star was seen flashing the bottom of her breasts at the Wireless festival this weekend, wearing a tiny crop top which didn’t quite cover her whole chest.
But Rihanna’s not the only the celeb riding high with a bit of underboob.
Here are some of our favourites — but can the underrated underboob really rival the supremacy of the sideboob?
Have a look at this lovely lot then vote in our po