STUPID CUPID!

LOVE IS FOREVER — unless you’re a star. Some of Hollywood’s top celebrities have pledged their love loudly and publicly, only to have to eat their words later! Here are some of the best before and after quotes from the affairs of the rich and glitzy of TinselTown.

SYLVESTER STALLONE & . . . SEVERAL OTHERS

When action flick stud-muffin Sly met statuesque Brigitte Nielsen while filming “Rocky IV” in 1985, he declared: “This gorgeous blonde is a towering monument to womanhood.” It was a temporary monument, though, because the two divorced hastily in 1988.

Afterward, Stallone summed it up: “Love makes you do stupid things like marrying people you shouldn’t.”

Sly became engaged just a few weeks after meeting model Angie Everhart in 1995. “She’s gorgeous, she’s bright, and she’s my soul mate. I’ve finally found someone I know is the right woman,” he crowed. “I haven’t known her very long, but I want to spend the rest of my life with her.”

After breaking off the engagement less than two months later and taking up with Jennifer Flavin, Sly beat a retreatthat Rambo would have been ashamed of: “Engagement? What engagement?” he said.

ROSEANNE AND TOM ARNOLD

Early in their marriage, Roseanne’s second in 1990, she revealed: “Tom came to join me on a movie set and we went wild. It was an all-day sexual marathon.

“By the time we’d finished there was a lot of broken furniture in that hotel room. We’ve also got down to do it in restaurants. We just can’t help it.”

But they ran out of steam and Roseanne “belittled” Arnold about the size of his manhood — and Tom replied: “Even a 747 looks small in the Grand Canyon!”

BRAD PITT AND GWYNETH PALTROW:

While they were an item, Gwyneth bubbled: “Brad has got everything. He’s incredibly sensitive and intelligent. He is very close to his family and a great guy and a perfect gentleman.”

But after the glamourpuss pair wound up in Splitsville, Gwyneth declared bluntly: “Our relationship just wasn’t healthy.”

ELIZABETH HURLEY AND HUGH GRANT:

The pair never married, but they were so in love that they were planning a family together.

Said Liz: “I can’t imagine not having children and I can’t imagine having children without Hugh.” Liz dumped Hugh last year: “Neither of us thought we were ready to have children. That’s really why Hugh and I ended up splitting up.”

PAM ANDERSON AND MARCUS SCHENKENBERG:

When bombshell Pam first met the hunky male model last summer, she blurted: “We’re so in love. Will there be wedding bells? You betcha! He’s the only one for me. I’ve never been this happy. He’s got great husband material, and I think he’ll make a great daddy too.”

But Pam sang another tune later. “I was dating Marcus for a while but I’m not anymore. He’s a nice man but I’m looking for something different in life. I want passion.”

LIZ TAYLOR AND LARRY FORTENSKY:

When she married for the eighth time, Liz gushed: “Larry is one of the brightest people I’ve ever known. He absorbs like litmus paper. We decided we wanted to spend the rest of our lives together. With God’s blessing, this is it, forever.”

Apparently, Larry got a lot dumber during the marriage, because when they broke up, Liz griped: “I couldn’t make Larry understand that we had to communicate. He stopped wanting to learn and stopped being inquisitive, which was one of the most fun things about him. He became very bossy, ordering people around, and he didn’t want to go to work.”