After 30 years of marriage . . . and more than 40 years as a couple . . . 5-foot comedic superstar DANNY DEVITO and his 5-foot-1 bride RHEA PERLMAN are splitting up.  There's no word why.  Danny and Rhea got married in 1982.  They have three kids, who are all in their 20s.

Whether KRISTEN STEWART and ROBERT PATTINSON like it or not, they're legally bound to promote "Twilight:  Breaking Dawn - Part 2" together.  A source says, quote, "The studio execs weren't happy when Rob and Kristen broke up, but this is why there are clauses about what is required of the stars to do."  The movie opens November 16th. 

MARIA SHRIVER was spotted wearing her wedding ring this weekend.  Is she taking ARNOLD SCHWARZENEGGER back?  Nobody knows. 

An "American Idol" source says the MARIAH CAREY / NICKI MINAJ feud is "very real," and that the show wasn't able to film promos with them together last week.  Also, the staff and crew is supposedly so fed up with it . . . that they're already wishing JENNIFER LOPEZ and STEVEN TYLER were back

REGGIE BUSH may have knocked up his girlfriend, who's a KIM KARDASHIAN look-alike.  Kim was reportedly upset when she heard about it, because she was holding out hope that they'd get back together someday