Reunited Romances!

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Jessica Simpson & John Mayer

This pair (at Sony's Grammy afterparty in the Beverly Hills Hotel Feb. 2007) went from touring together - Simpson joined Mayer on his Continuum shows in Florida in Jan. 2007 - to splitsville just six months later, after a tear-filled trip to Cabo San Lucas. Still, in January, Mayer called his ex a

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Ben Affleck & Jennifer Lopez

This couple (at the premiere of their panned  movie Gigli in Westwood, California, July 27, 2003) broke up and reconciled for a year and a half until publicists confirmed Jan. 22, 2004 that they had called off their engagement.

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Pamela Anderson & Rick Solomon

Trouble brewed about two-months after their Oct. 2007 Vegas wedding. After filing for divorce twice, Anderson instead asked for an annulment (at the Planet Hollywood Resort and Casino Grand Opening in Las Vegas Nov. 16, 2007).

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Jessica Alba & Cash Warren

After telling Warren, her boyfriend of 2.5 years, that she "didn't love him anymore" over the phone, Alba sent an assistant to their shared home to clear out his belongings last July. One month later, the pair reconciled, and now they're engaged and expecting their first child (at the Oscars Feb. 2

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Kate Hudson & Owen Wilson

Hudson announced she was splitting from husband Chris Robinson on Aug. 14, 2006 - and multiple sources confirmed to Us that Wilson was the main catalyst. After a year, the pair called it quits, but just last month Wilson was seen driving his Prius away from Hudson's home.

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Prince William & Kate Middleton

Just before news of their split hit the media April 13, 2007, Prince William hit up a London nightclub, racked up a $10,000 tab and "was struggling to stand up," a club source told Us. Just six months later, they had reconciled.

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Lauren Conrad & Stephen Colletti

These high school sweethearts (at L.A.'s Opera in Hollywood Sept. 20, 2007) rekindled their high school romance by making out and dancing at L.A.'s Central on Dec. 29. A month later, Conrad told Us, "We're just friends!"

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Heidi Montag & Spencer Pratt

This couple (at EA's "Burnout Paradise" party in L.A. Feb. 12) was set to walk down the aisle - until their split, when Montag said she needed time "to think" alone and then walked out on her fiance. "We're just going back to being boyfriend and girlfriend..." Montag told Us.

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Nicollette Sheridan & Michael Bolton

This pair (at the Over Her Dead premiere in L.A. Jan. 29) - who became engaged in March 2006 in the Bahamas - first dated for several years in the early '90s.

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Reese Witherspoon & Jake Gyllenhaal

These co-stars (at a photocall in Rome, Oct. 21, 2007) hooked up on the set of their movie Rendition, but cooled off during the Toronto Film Festival. One month later, they made up and walked around the streets of Rome arm-in-arm during the city's film festival.