NEW YORK – from www.nypost.com – A buxom Playboy centerfold tried to bust out — midair — from a jet yesterday amid a bad case of high anxiety.

Sexy 21-year-old model Tiffany Livingston was aboard JetBlue Flight 522 from Orlando, Fla., to Newark when she bolted from her seat and tried to open the door of the plane, a law-enforcement official said.

“She said she’s gone through this before, but never this bad, and didn’t have . . . her medication,” one source said.

Livingston was detained and placed in federal custody, with charges pending, last night.

Last year, Livingston, a 5-foot-6 brunette from Merrimac, RI, was featured as the centerfold for the debut edition of VIP, the Singapore version of Playboy, in which she was described as “not just another pretty face.

“Tiffany boasts the immaculate poise of a mature model wrapped with a bubbly demeanor,” the profile said.

Her agent did not return a call seeking comment.

from www.tmz.com – Livingston (32C-22-33) was placed in federal custody last night, after, according to the NY Post, she allegedly suffered an anxiety attack aboard a JetBlue flight bound for Newark … and people on board believed she tried to pry open the door at 10,000 feet.

Livingston — who was featured as a centerfold in the debut Singapore edition of Playboy — was immediately detained and now faces federal charges.

A source close to the model tells the NY Post, “She said she’s gone through this before, but never this bad, and didn’t have . . . her medication.”

UPDATE: from www.tmz.com – TMZ has learned … feds interviewed Livingston after the flight and determined that she was not trying to open the door. Instead, officials believe she was trying to stabilize herself during a panic attack brought on by turbulence.

We’re told several passengers saw Livingston touch the door … and did think she was trying to open it … but ultimately, officials aren’t buying that story.

A rep for the FBI tells us Livingston is no longer in custody and they are not pursuing this as a criminal matter.