BRITNEY SPEARS vs. NICKI MINAJ - WHO YOU GOT???: Rumor has it BRITNEY SPEARS and NICKI MINAJ, who is Brit's opening act on her Femme Fatale tour - are not getting along.

According to the not-always-reliable Mediatakeout, the two have been butting heads over Nicki's time time on stage. A source told the not-always-reliabe gossip site, "[Britney] is upset that Nicki [keeps] running over [her allotted] time.

Now this is where the story gets very "West Side Story"-ish (Google it, kids!) ... Saturday night in San Jose - after Nicki reportedly went over by nearly 45 minutes - Britney supposedly rolled by Nicki's dressing room with her dancers. "They were talking s*** like they were going to do something," claims their source.

"Nicki came out [of her dressing room] and at first was going to beat someone's a**. But when she saw how RIDICULOUS Britney and them looked, she just laughed."

COULD BE TRUE COULD BE CRAP - DOES KATY PERRY GET BUTT INJECTIONS???!!!: KATY PERRY is known for her booming body, but according to London's 'Daily Mail' it's not all from hard work as she leads people to believe. They claim Katy got butt injections while she was in India.

The singer reportedly got a vitamin B/antibiotic/steroid injected into her booty to give it a bit of a lift. The Daily Mail says the concoction has been "used for many years in the Third World, where patients cannot afford more advanced procedures." It's said to cause inflammation and, in turn, lift the buttocks."

CELEBRITY BIRTHDAYS: Today's celebrity birthday list includes a former 'American Idol' winner, and the second in line to the British throne ...

ROMANCE REPORT - MEL'S NEW GIRL: MEL GIBSON reportedly has a new girlfriend. TMZ says it’s Ukrainian gothic fetish model Stella Mouzi.

(Hint: click on her name above to see some of her fetish work)


HUGH HEFNER'S NEW GIRLFRIEND WAS EX-GIRLFRIEND'S BFF!!!: Now we know why HUGH HEFNER didn't lock himself in a darkened room for 72 hours straight while eating nothing but pepperoni and Cheez Whiz straight from the can after getting dumped five days before the wedding. It turns out he's been getting all smoove up in his new girlfriend for a while now. In fact, the whole time he was engaged to CRYSTAL HARRIS!!! But wait, it gets better: his new girlfriend was Crystal's best friend!!!

And Hugh wasn't even messing around behind Crystal's back. He and ANNA SOPHIA BERGLUND have been sharing their low places with Crystal's full knowledge the whole time!!! By the way . . . word is Hugh is letting Crystal keep the $90,000 engagement ring, plus a Bentley he gave her.

ROMANCE REPORT - PARIS AND HER BOYFRIEND DONE: PARIS HILTON is single again. A source tells 'Us Weekly' she and Cy Waits have called it quits. "He found it difficult to live his life with her in the spotlight and that's what caused their split." says the insider.

Just yesterday, The "New York Post" reported Cy was having a particularly hard time being part of Paris' reality show, "The World According to Paris". He told the Post he had no idea the cameras would be so invasive.


BABY NEWS: NKOTB’s JOEY McINTYRE tweeted this picture of his newborn baby girl Kira Katherine …