Britney Spears has performed at her Piece Of Me residency at the Axis Theater in Planet Hollywood since December of 2013. And if current contract negotiations go a certain way, she might be putting in work (bitch) there a whole lot longer.

As of this week, the "Change Your Mind (No Seas Cortes)" superstar just added 12 new dates onto the Piece Of Me performance calendar from August through September, with tickets going up for general on-sale this Friday (Feb. 10). (That announcement most likely hasn't come from Spears herself yet due to the personal emergency in the Spears family right now.)

While her deal is currently scheduled to end in December, according to a new report today (Feb. 6) by Las Vegas Review-Journal's Robin Leach, negotiations "are underway" for a much longer renewal to her already four-year long deal "for two additional years through the end of 2019."

Britney will notch her 200th Piece Of Me show at Planet Hollywood during her upcoming March-April leg. In February of last year, Britney revamped the show with new songs, choreography and outfits with her Remixed, Reimagined and Still Iconic reopening. The show recently celebrated passing the $100 million mark in ticket sales.

Britney has repeatedly expressed interest in touring beyond her Las Vegas stage in recent interviews, although nothing has come of it beyond passionate global fan campaigns. Will it ever happen again? In the words of Britney herself, you're gonna have to wait and see.

See Photos From the Relaunch of Piece Of Me: