Rihanna wore a custom Jacquemus dress resembling a bathrobe at the launch of Fenty Hair in London on Sept. 16. Later in the night, she changed into a 2006 John Galliano gown.

With her face painted in full glam and hair combed into sleek glossy black waves, the megastar transformed the bathroom staple into elegant, enviable evening wear.

If there's one thing Rihanna is an absolute pro at, it's leaving her fans in awe with her jaw-dropping looks. The ever-stylish "Diamonds" singer stepped out for a celebratory event in honor of her Fenty Hair brand on Monday,

Robyn Rihanna Fenty – the woman you are! The Fenty mogul popped up at the end of London Fashion Week for the launch of Fenty Hair in a trendy bathrobe.