Nicki Minaj is opening for Britney Spears on her Femme Fatale world tour, and Minaj is happy the experience will be completely substance-free "as it should be," she tells Life & Style.

"I think it's a great thing. If that's the way Britney wants it, so be it. She's the queen of her castle. It trickles down and makes everyone responsible."

Minaj says touring with Britney will be life changing.

"We start on June 17, and I'm sure it's going to be a whirlwind. I'm sure it's going to change the way I view touring. Every tour I do is different, and I get new energy."

Britney has been in the press as of late because her ex-manager Sam Lutfi is filing a motion to get her a court-mandated psychiatric evaluation.

Lutfi argues that Spears is mentally capable to testify in his lawsuit against her mother, Lynne, for allegedly defaming him in her memoir, Through the Storm. Lynne and Britney's father, Jamie, say their daughter is too mentally unstable to testify. Lutfi says that if Britney can go on tour, she can testify in court.

Nicki Minaj is opening for Britney Spears on her Femme Fatale world tour, and Minaj is happy the experience will be completely substance-free "as it should be," she tells Life & Style.

"I think it's a great thing. If that's the way Britney wants it, so be it. She's the queen of her castle. It trickles down and makes everyone responsible."

Minaj says touring with Britney will be life changing.

"We start on June 17, and I'm sure it's going to be a whirlwind. I'm sure it's going to change the way I view touring. Every tour I do is different, and I get new energy."

Britney has been in the press as of late because her ex-manager Sam Lutfi is filing a motion to get her a court-mandated psychiatric evaluation.

Lutfi argues that Spears is mentally capable to testify in his lawsuit against her mother, Lynne, for allegedly defaming him in her memoir, Through the Storm. Lynne and Britney's father, Jamie, say their daughter is too mentally unstable to testify. Lutfi says that if Britney can go on tour, she can testify in court.

Julianne Hough wants to make sure she's in tip top shape for her upcoming role in Rock of Ages ... opposite Tom Cruise. Judging by her form on the bike, she's doing a pretty good job so far! Earlier in the week, we caught the former Dancing With the Stars pro going for a run.

Hough is keeping mighty busy in Miami where the movie is being filmed. Too bad beau Ryan Seacrest isn't able to ride along with her. We have a feeling that would be a distraction.

Way to stay on track with your fitness, Julianne! See her sexy Rock of Ages co-star Diego Boneta grabbing a drink post workout ... after the jump.

Julianne Hough wants to make sure she's in tip top shape for her upcoming role in Rock of Ages ... opposite Tom Cruise. Judging by her form on the bike, she's doing a pretty good job so far! Earlier in the week, we caught the former Dancing With the Stars pro going for a run.

Hough is keeping mighty busy in Miami where the movie is being filmed. Too bad beau Ryan Seacrest isn't able to ride along with her. We have a feeling that would be a distraction.

Way to stay on track with your fitness, Julianne! See her sexy Rock of Ages co-star Diego Boneta grabbing a drink post workout ... after the jump.

What a HOT couple!

Kim Kardashian couldn't stop smiling as she held BF Kris Humphries hand on their way to dinner at Boa steakhouse in LA -- love the nude Louboutin's Kimmy!

The reality star and the New Jersey Nets power forward began dating at the end of last year, after Kardashian finished filming season six of Keeping Up With The Kardashians. They've been going strong ever since, and have even met each other's parents!

Could this finally be the real deal for Kim? We'd love to see the 30-year-old mega-mogul walk down the aisle soon; she'd make such a beautiful bride!

What a HOT couple!

Kim Kardashian couldn't stop smiling as she held BF Kris Humphries hand on their way to dinner at Boa steakhouse in LA -- love the nude Louboutin's Kimmy!

The reality star and the New Jersey Nets power forward began dating at the end of last year, after Kardashian finished filming season six of Keeping Up With The Kardashians. They've been going strong ever since, and have even met each other's parents!

Could this finally be the real deal for Kim? We'd love to see the 30-year-old mega-mogul walk down the aisle soon; she'd make such a beautiful bride!

Movie night or date night?

Dancing With The Stars contestant (though he's now out of the competition) Romeo, 21, took American Idol alum Jordin Sparks, 21, not out dancing, but out for a classic American night: a night at the movies.

Romeo took Sparks to the premiere of The Hangover Part II Thursday night at Grauman's Chinese Theatre in Hollywood. The actor/singer Tweeted:

"Movie night wit @jordinsparks #HangOver2"

And Jordin took to Twitter as well:

At The Hangover 2 premiere with @romeomiller!

Romeo also Tweeted a photo of the the two -- they look awfully happy!! If only her name were Juliet ...

Romeo is quite the casanova; he recently locked lips with a woman almost 40 years his senior ... Kirstie Alley!

See Jordin's response to Romeo's Twitpic after the jump, plus video of her arriving at the premiere!

Movie night or date night?

Dancing With The Stars contestant (though he's now out of the competition) Romeo, 21, took American Idol alum Jordin Sparks, 21, not out dancing, but out for a classic American night: a night at the movies.

Romeo took Sparks to the premiere of The Hangover Part II Thursday night at Grauman's Chinese Theatre in Hollywood. The actor/singer Tweeted:

"Movie night wit @jordinsparks #HangOver2"

And Jordin took to Twitter as well:

At The Hangover 2 premiere with @romeomiller!

Romeo also Tweeted a photo of the the two -- they look awfully happy!! If only her name were Juliet ...

Romeo is quite the casanova; he recently locked lips with a woman almost 40 years his senior ... Kirstie Alley!

See Jordin's response to Romeo's Twitpic after the jump, plus video of her arriving at the premiere!