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10. WRITING A SONG
Brad Paisley was inspired by wife Kimberly before he even met her – writing some of his album Part II after seeing her in Father of the Bride. And she's still his muse, appearing in his sweet ode "Little Moments." When Paisley sings, "And I can't even remember now/what she backed my truck into," Kimberly chimes in, saying, "I never crashed your truck, you know." His reply? "Give it time."
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9. MATCHING TATTOOS
What better way to spell out your love than with his-and-her ink? Just before their surprise wedding in 2008, Mariah Carey and Nick Cannon got permanent tattoos to commemorate their nuptials. "His is on one shoulder to the other and it says 'Mariah,'" Carey told PEOPLE. And hers? "It's on my lower back and it says 'Mrs. Cannon.'"
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7. PROPOSING ON STAGE
Garth Brooks surprised longtime girlfriend Trisha Yearwood by popping the question onstage during a concert at Buck Owens's Crystal Palace in Bakersfield, Calif., in 2005. "You're not going [to do this] in front of these people?" Yearwood asked – at which point Brooks got down on his right knee and asked, "Will you marry me?" Yearwood instantly said yes and wiped away a tear.
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5. RENEWING YOUR VOWS
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4. MAKING OUT ON TV
Last March, Ashlee Simpson-Wentz put her passion for hubby Pete Wentz on display at the MTV Australia Awards. Amid cheers from the crowd, the couple kissed for several minutes onstage. "Sorry, we haven't seen each other in a while," Wentz told the crowd. "We're going to go and find some quiet time and fornicate somewhere."
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3. GETTING NAKED
Just because you can afford designer duds doesn't mean you always have to wear them! Christina Aguilera and husband Jordan Bratman doff their clothes once a week for "naked Sundays." "We just do everything in the house, and we're just cozy and laid back," the star told Ellen DeGeneres. "We don't need to go anywhere, we're just with each other. We do everything naked. We cook naked."
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2. PROCLAIMING YOUR LOVE ON OPRAH
Some people shout their love from the rooftops. Tom Cruise shouted his from the top of Oprah Winfrey's couch during an appearance on her talk show. Amid giggling, falling on his knee and jumping, he declared, "I'm in love" – then went backstage and pulled Katie Holmes on-camera for a hug and a kiss.
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1. BUYING A $100K CAR FOR YOUR SWEETIE
For her 20th birthday, Hilary Duff thought her hockey player beau Mike Comrie would get her "shoes or something," she told PEOPLE. Well, the present did help her go places: Comrie surprised the actress by leaving a Mercedes-Benz G-class SUV (a $100,000+ ride) in her garage – complete with a red bow on top.