She's going to hit it 100 more times: Britney Spears to have a two-year engagement in Vegas

Stress-sensitive pop star Britney Spears announced Tuesday she's committing to a two-year engagement at the Las Vegas Planet Hollywood Resort & Casino beginning Dec. 27 and will perform 50 shows there each year.

"I'm definitely ready," said Spears, who described the "energy" in Vegas as "really, really good."

Tickets for the "Piece of Me," show start at $59 and went on sale Tuesday.

"Preston will probably be on stage," Spears told "Good Morning America's" Sam Champion, referring to her 8-year-old son with former husband Kevin Federline, but his brother Jayden, who is seven, "would probably have a hard time," she opined.

Spears also gave props to Miley Cyrus for her saucy performance at the VMAS ("any time you do a performance that is that memorable, you're going to get criticism"), revealed that her first kiss was with Justin Timberlake around the age of 13, and announced that she expects to release her eighth album in December and that songs on it will reference her split from Jason Trawick.

"Break-ups suck, man, they do," said Spears.