Who? Marilyn Monroe this morning - which would have been the icon's birthday - by giving herself a Monroe makeover, and sharing the results with her Twitter followers.
"#HappyBirthdayMarilyn They'll never take our blonde hair and lipstick," she Tweeted.
The singer is currently on the road in Asia with her Born This Way Ball tour - posting the picture from her Singapore hotel room.
"Laying in bed looking at costume jewelry online. Only thing difficult about being on the road. NO QVC!!! Home Shopping Network where r you!" she also wrote.
We hear you, Gaga.
Celebrate Marilyn Monroe's birthday with us (and Gaga), by looking back at some of her iconic style moments below: