Lots of Barbz, boobs, and bobs later, Nicki Minaj wrapped Britney Spears’ “Femme Fatale” tour in Toronto on Sunday. A blonde-haired Nicki, sporting a Hello Kitty T-shirt, posed with her fans at the last meet and greet and bid adieu to the pop queen herself.

“Popped bottles w/the crew. Did my final meet & greet. (Got proposed to twice). Gave brit flowers and told her she’s an icon,” tweeted the “Super Bass” rapper.

But don’t be sad. The femme fatales may be sharing the stage again soon. There are rumors that Nicki will participate in a tribute to Britney at the MTV VMAs on August 28.

[My Pink Friday]

Lady Gaga showed love to fellow pop darling Britney Spears by attending the “Femme Fatale” tour at Boardwalk Hall Arena in Atlantic City last night. Unmistakable in a black bra, leather gloves, cap, and sunglasses, the “Born This Way” singer sipped on a cocktail while enjoying the show with friends.

“Atlantic City, I have a very special guest here tonight. Lady Gaga is in the house!” announced Brit before blowing a kiss to Gaga. “It is such an honor to have her here.”

The blonde star stood up as the spotlight shined on her, making a heart shape with her hands and bowing to Britney.

R. Kelly joins the party on the remix to his labelmate Britney Spears’ hit single “Till the World Ends.” Kellz, who’s currently on his nationwide “Love Letter” tour, keeps most of the beat intact, adding his own bubbly verse. “Slide up in this club, this beat’s got me in love,” he sings through a digital filter, climaxing with some high notes at the end. The party don’t stop.

It’s Britney…and Nicki Minaj! The femme fatales teamed up for their first live performance together on Britney’s “Femme Fatale” tour at the Staples Center in Los Angeles on Monday night (June 20). Britney closed the show with “Till the World Ends,” bringing out her tourmate for the grand finale.

The crowd roared with applause as the ladies stood side by side and performed the song’s remix before Britney took flight above the stage and confetti shot in the air. Now that’s how you close a show!

All aboard the S.S. Nicki. Nicki Minaj’s ship sailed into the Billboard Music Awards for a very pink performance. The Young Money raptress performed “Super Bass” and brought out Britney Spears for a second time in the evening to duet on their remix of “Till the World Ends.” It’s Britney and Nicki, bitch!

[MWP]

Rihanna kicked off the 2011 Billboard Music Awards in a bondage-inspired outfit, bringing out Britney Spears for the remix to her raunchy single “S&M.” The ladies then recreated every man’s dream, working the pole and having a pillow fight during their sexy set. We like it, like it.

[MWP]

Just when you thought the lineup for the Billboard Music Awards couldn’t get any bigger, two pop megastars are scheduled to ignite the stage. Beyoncé and Britney Spears will reportedly perform at this weekend’s show.

Sasha Fierce will not only be the recipient of the Millennium Award at Sunday’s ceremony, but viewers will be treated to the first televised performance of her new single “Run the World (Girls).” She performed the song for the first time at Oprah’s farewell show taping earlier in the week. Promos for the awards have been touting her appearance as one that “will leave American talking.”

Her fellow diva Britney Spears will also take the stage, according to Us Weekly. Their sources claim that Brit will join Rihanna for their remix to “S&M,” and appear alongside her “Femme Fatale” tourmate Nicki Minaj for the remix to “Till the World Ends,” also featuring Ke$ha.

While no official announcement has been made, Billboard tweeted, “loving rumors re @britneyspears playing Billboard Music Awds. Better watch Sun 8 PM ABC. Lets say there’ll be surprises.”

Other performers on the bill include Rihanna, Nicki Minaj, Jennifer Lopez, Black Eyed Peas, Cee Lo Green, Pitbull, and Lil Wayne with Mary J. Blige. The 2011 Billboard Music Awards will air live on Sunday at 8 p.m. EST on ABC.

Lupe Fiasco was among the acts on the bill at KIIS FM’s Wango Tango at Staples Center in Los Angeles on Saturday (May 14). Before coming to the stage, the Chicago rapper received a superstar introduction from the evening’s co-host Britney Spears.

“I love him,” said the popstress, sharing the mic with Ryan Seacrest. “Wango Tango, get on your feet for Lupe Fiasco.”

Lupe then performed a set comprised of his biggest radio hits including “The Show Goes On” and “Superstar.”

Nicki Minaj and Britney Spears partied like it was 2012 during the after-party for Lil Wayne’s “I Am Still Music” concert at Staples Center in Los Angeles. Posted up in VIP at West Hollywood’s Factory Club, the blonde bombshells celebrated the release of the remix to Brit’s hit “Till the World Ends,” which also features Ke$ha, debuting the tune for those in attendance.

“Hanging with my girl @NickiMinaj at her after party at The Factory. Love you girl,” tweeted the pop starlet, who hugged it out with her “Femme Fatale” tourmate.

The Pink Friday rapper also shared her excitement over kicking it in the club with Spears. “VIP w/Britney and Khloe [Kardashian]. Its waaayyy too sexxxy in here right now! Ha!” she wrote, later adding, “Had a blast w/the Queen!”

[Photos via My Pink Friday]

It’s Britney and Barbie, bitch. Britney Spears links with her tourmate Nicki Minaj on the official remix to “Till the World Ends,” also featuring the song’s writer Ke$ha. “Chimpanzees is hatin’, but I take it all in stride/ Put her in a jungle with bananas on the side/ Told you they’d revive your career, but somebody lied/ I ain’t talkin’ poultry when I say this chicken’s fried,” fires Nicki. Let the femme fatales rock your world below.