WIth Lady Gaga playing it relatively safe this year, it was Miley Cyrus who made everyone's jaws drop at the 2013 MTV Video Music Awards.
The 20-year-old performed a plushie-packed rendition of her hit "We Can't Stop" before launching into a duet of "Blurred Lines" with Robin Thicke -- one that saw her stripping down to nude-colored underwear and grinding all over the married man's crotch.
Oh, did we mention Thicke's wife Paula Patton was in the audience? Awkward.
And Twitter reaction to the raunchy performance was all over the place, with fans and stars speaking out about what they just saw.
Here are some of the best celebrity reactions below -- what'd you think of it?
Thanking God for so many blessings tonight. Continue to pray for world peace. More love ...less hate.