Pretty Young Thing
As mentioned in the song D.A.N.C.E by Justice

"P.Y.T." was famously referenced by President Ronald Reagan during Jackson's 1984 White House visit, saying "Let's give some T.L.C. to the P.Y.T.s."

The song was sampled by Monica on her 2002 single, "All Eyes On Me."

The chorus of the song is also used in the song "I Wanna Love U" by Memphis Bleek, from his album M.A.D.E., sung by Donell Jones.

In the beginning of the song, Jackson whispers, "You know, you... you make me feel so good inside. (chuckles) I've always wanted a girl just like you. You're such a P.Y.T., Pretty Young Thing".

Almost at the end, he says, "You know, I think I'm nice enough. You I could've, you know, just get together. You're such a P.Y.T. to me. Pretty Young Thing." At the end he says, "I just want to love you, you know. (chuckles) I'll give you all that I've got."

short for Pretty Young Thing

Annalise Holmes, nuff said.

PYT = Pretty Young Thing

Pretty Young Thing
Used by an old singer called Michel Jackson, I believe, but it was twenty years ago (in the 80's)!!!
In summer 2007, a french electronic music group JUSTICE sang it in their blasting hit D.A.N.C.E.

PYTs (Pretty Young Things) was originally a group of 5 SEXY members. This group is now known for playing Minecraft Factions and being the probably worst faction out there. They are known for ganking other factions and getting all the ladies sopping wet. The faction grew and won f top prizes on small servers. PYTs love getting ladies and getting more ladies and don't forget getting ladies.

According to 'Another Cinderella Story', it stands for Paid, Young, and Taking on the World from the Driver's Seat.