This week Kristen Stewart wore her typical "rebel without a cause" attitude on the Cannes red carpet, where she went against the glam dress code and turned up in a bandeau bra.
Kirsten Stewart attends Cannes Film Festival. Photo / Getty
But it's not just on the red carpet that we're seeing celebrities parading in only their bras.
You only need to look at the latest pap snaps to see famous faces heading to the gym, or popping out for a latte, in their best sports bra. That's right, activewear has gone to the next level.
Billy Ray was the only member of the Cyrus clan who remembered his shirt at the Billboard Music Awards. Photo / Getty
The stepping out sans shirt movement isn't revolutionary though. Madonna proved long ago that the humble bra can be a fashion statement all on its own and designers like Vivienne Westwood and Jean Paul Gaultier have hailed the undergarment in their latest collections.
Cher knows how to rock an undergarment. Photo / Getty
Keen to get in on the trend? Maybe you'd be inspired by Cher, who committed 100 per cent to the look at the Billboard Music Awards.