Sources: Nicki Minaj In Discussions to Join Britney Spears Tour

Endless Summer 2011: Hot Tours & Music Festivals

Nicki Minaj is in discussions -- but not confirmed -- to support Britney Spears on the latter's upcoming tour, after Enrique Iglesias abruptly pulled out hours after the tour was announced, sources have told Billboard.

Minaj is currently on the road with Lil Wayne on his I Am Still Music tour. Spears' tour begins June 17 in Sacramento. Tour promoter Live Nation and representatives for Minaj could not be reached for comment.

Enrique Iglesias-Britney Spears Tour Still Possible, Source Says

Hours after a Spears-Iglesias tour was announced on Tuesday (Mar. 29), Iglesias pulled out of the summer trek, reportedly due to the perception that Iglesias would be opening for Spears instead of co-headlining the tour with her. Although Spears has expressed interest in adding Usher to the tour, the R&B star is highly unlikely to join the trek, as he is managed by Randy Phillips who also helms AEG Live, producers of Spears' last tour and very competitive with current promoter Live Nation.

"Femme Fatale," Spears' seventh album that was also released on Tuesday, is expected to reach No. 1 on next week's Billboard 200. Meanwhile, Nicki Minaj's debut album, "Pink Friday," has moved 1.3 million copies since its November release, according to Nielsen SoundScan.

Here are Britney Spears' previously announced tour dates:

June 17: Sacramento, Ca. (Power Balance Pavilion)
June 18: San Jose, Ca. (HP Pavilion)
June 20: Los Angeles, Ca. (Staples Center)
June 24: Anaheim, Ca. (Honda Center)
June 25: Las Vegas, Nev. (MGM Grand)
June 28: Portland, Oreg. (Rose Garden Arena)
June 29: Tacoma, Wash. (Tacoma Dome)
July 1: Vancouver, B.C. (Rogers Arena)
July 4: Winnipeg, M.B. (MTS Centre)
July 6: St. Paul, Minn. (Xcel Center)
July 8: Chicago, Ill. (United Center)
July 12: Dallas, Tex. (American Airlines Center)
July 13: Houston, Tex. (Toyota Center)
July 15: New Orleans, La. (New Orleans Arena)
July 17: Atlanta, Ga. (Philips Arena)
July 20: Orlando, Fla. (Amway Center)
July 22: Miami, Fla. (American Airlines Arena)
July 26: Cleveland, Ohio (Quicken Loans Arena)
July 28: Detroit, Mich. (Palace of Auburn Hills)
July 30: Philadelphia, Pa. (Wells Fargo Center)
July 31: Washington, D.C. (Verizon Center)
Aug. 2: Uniondale, N.J. (Nassau Coliseum)
Aug. 5: East Rutherford, N.J. (Izod Center)
Aug. 8: Boston, Mass. (TD Garden)
Aug. 11: Montreal, Quebec (Bell Centre)
Aug. 13: Toronto, Ont. (Air Canada Centre)

(Additional reporting by Jason Lipshutz, Billboard)