Sesame Street is well-known for helping kids learn their ABCs. But this week, the show came under fire for trying to teach them their T&As!

Pop singer--and owner of two of the juiciest jugs in the music industry--Katy Perry recently shot a spot for the kiddie show, perv-forming her song "Hot and Cold" alongside Elmo while wearing a super low-cut bustier. The clip hit the net, and parents hit the ceiling, complaining that Katy's cleavage was far too big and bouncy for children's TV!

The video got a barrage of angry comments, such as:

-- "You can practically see her tits. That's some wonderful children's programming."
-- "they're gonna have to rename it cleavage avenue"
-- "my kid wants milk now"

Check out Katy's too-hot-for-PBS vid below, and don't forget to have a look at some actresses who've guest starred on Sesame Street AND have done great career nudity: Lisa Bonet, Phoebe Cates, Maggie Gyllenhaal, and Susan Sarandon. They'll give you a Big Bird!