Are These Celebs a Couple? Only They Know For Sure

Early signs: The pair were first spotted getting cozy in March 2007. By June, any signs of romance had cooled, but by fall all indications pointed back to a union as the two were photographed strolling together on the streets of Italy. Just weeks later, People reported they checked in at Carneros Inn in the Napa Valley.

The scoop: While the two still have not confirmed they're dating, Ryan Phillippe, Witherspoon's ex-husband, told "USA TODAY" that he avoids magazines featuring photos of the two. "It's bizarre," Phillippe said. "There's plenty of times when I say, 'What a strange situation I've found myself in.' But at a certain point you know it's going to happen, so you are prepared in some fashion."

Handholding: No

Talking to media: No

Vacation together: Yes

Justin Timberlake, 27, and Jessica Biel, 26

Early signs: In January 2007, the two were spotted getting close at Prince's Golden Globes party. By the end of the month, they were glimpsed snowboarding together in Park City, Utah. In May, she visited him while he had concert dates in Britain; in June, she joined him at tour stops in Amsterdam and Stockholm.

The scoop: They're often seen holding hands, and recently attended Hollywood stylist Estee Stanley's wedding together. But both have remained mum about their relationship. "Justin is getting more and more private with every girlfriend," says Ivens. "With Britney (Spears), they were America's young teen dream. With Cameron (Diaz), she was a bubbly actress and, coming straight off Britney, it was a big draw." With Biel, "he quite sensibly has pulled away."

Handholding: Yes

Talking to media: No

Vacation together: Yes

MASTERS OF 'ARE THEY OR AREN'T THEY?'

Beyoncé, 26, and Jay-Z, 38

The signs: After their first official musical collaboration, '03 "Bonnie & Clyde," in October 2002, rumors heated up about romance. The couple remained mum during an MTV TRL appearance a month later. In 2003, they put on a sizzling performance at August's MTV Video Music Awards. A month later, they were photographed together at the U.S. Open and Fashion Week in New York.

The scoop: No word yet from either camp. "Sometimes couples don't want to play ball and sell photos and talk about their relationship," Ivens says. "I'm not sure if Beyoncé will release (wedding) photos."

Joint red carpets: Sometimes

Talking to media: No

Marriage license: Yes, "People" reports

Janet Jackson, 41, and Jermaine Dupri, 35

The signs: They had worked together several times on songs for her albums by the time Jackson said that she was in love in March 2004. She and the record company exec/producer had been serious for nearly two years by then. "He's so good for me," she told "USA TODAY." He was her love interest in the I Want You video.

The scoop: Both have railed against rumors they are married. They're not, she says. And that's OK with her. "So many people were putting pressure on (Dupri), then they started pressuring me," Jackson told TV's "The Insider" in February. "I like where we are, and I'm happy where I am. I've done it twice before. I'm afraid I might be a jinx. I might be allergic to marriage."

Joint red carpets: Sometimes

Talking to media: Sometimes