Is It Love? You Decide!

Are Nick & Vanessa, Sienna & Hayden and other duos made for each other? Tell us! By Emily Fromm

01 of 10

NICK & VANESSA

NICK & VANESSA
Jon Kopaloff/FilmMagic; Soul Brother/FilmMagic

Nick Lachey, 32, and MTV's Vanessa Minnillo, 25, have known each other for years – she's even starring in his upcoming video – but lately they've been spotted in New York City dining, dancing and getting extra cozy.

02 of 10

HALLE & GABRIEL

HALLE & GABRIEL
Gregory Pace/BEImages

The twice-divorced Halle Berry, 39, may have been disappointed by men before, but her beau since November, model Gabriel Aubry, 30, is clearly smitten. Says his dad, Gérard, "He told me he was in love."

03 of 10

SIENNA & HAYDEN

SIENNA & HAYDEN
INF

Sienna Miller and Hayden Christensen, both 24, flirted while filming Factory Girl in Louisiana (left, at a January cast party), and recently took their snuggle-fest off set: They've been spotted in Toronto, near his hometown, and in hers, London.

04 of 10

MISCHA & CISCO

MISCHA & CISCO
MAVRIX

Mischa Barton, 20, and Cisco Adler, 27, have been dating since October – and facing rumors of trouble for nearly as long. But Adler tells PEOPLE, "Oh, the reports! I read them and I'm like, 'We're on the rocks today, babe. Did you know that?' "

05 of 10

NICOLLETTE & MICHAEL

NICOLLETTE & MICHAEL
LDP Images

They dated in the early '90s, but Nicollette Sheridan, 42, and Michael Bolton, 53, are hoping the second time's the charm: They got engaged in early March just four months after rekindling their romance. Says a pal, "It's either fire or ice with those two."

06 of 10

NICOLE & DJ AM

NICOLE & DJ AM
mwd-mariotto/x17

Nicole Richie, 24, and Adam "DJ AM" Goldstein, 33, ended their engagement in December because "their lifestyles were different," an AM pal said. But lately, their affection has made a dramatic comeback – though her engagement ring hasn't.

07 of 10

KEIRA & RUPERT

KEIRA & RUPERT
Limelight

Keira Knightley, 21, has been a-courting with her Pride & Prejudice costar Rupert Friend. Let's hope he heeds her ex-boyfriend Jamie Dornan's words of warning: "The man is meant to be the Alpha in the relationship … and clearly I was not."

08 of 10

JOAQUIN & EVA

JOAQUIN & EVA
GERALDINA AMAYA/Frank Ross Media

While filming We Own the Night in New York City, Joaquin Phoenix, 31, and Eva Mendes, 32, have been making the club scene. Still, his rep insists they're just friends – and that Mendes has a longtime boyfriend.

09 of 10

PARIS & STAVROS

PARIS & STAVROS
souza-mwd/x17

While some reports said they were splitsville, Paris Hilton and shipping heir Stavros Niarchos seem to be going strong, for now. Hilton, 25, even told PEOPLE she'd tend to him after he recently broke his collarbone snowboarding: "I'll be his nurse."

10 of 10

JEN & VINCE

JEN & VINCE
BAUER-GRIFFIN

Jennifer Aniston, 37, said recently her perfect man has "loyalty, honesty ... good sense of humor." Vince Vaughn, 36, her boyfriend of about six months, has the latter in spades – but Aniston admitted she's not trying to beat her ex, Brad Pitt, to the altar.

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