Zuckerberg and Chan dining out in Rome (XposurePhotos.com)
Mark Zuckerberg and Priscilla Chan had a low-key courtship and wedding, so it's only fitting that their honeymoon is more of the same. Following their May 19 surprise wedding in their Palo Alto backyard, the billionaire and his new bride are celebrating their new life together during a getaway to Italy, where they have been sightseeing, dining out, and stealing romantic moments.

Vergara on vacation in Anguilla (Sofia Vergara/WhoSay.com)

Sofia Vergara isn't sitting at home crying over the change in her dating status from "in a relationship" to "single." Instead, the "Modern Family" star is having agood time!

Olsen is all smiles. (Derek Shook / Splash News)There really is a first time for everything. The usually stone-faced Ashley Olsen was photographed not only smiling — but she was also in a bikini! Clad in a cute red-and-yellow striped top and solid black bottom, the billionaire fashion mogul splashed around in the waves in Maui, Hawaii, last week during a getaway with friends, including her twin sister Mary-Kate … who remained bundled up on the sand in a polka-dot dress, light blue cardigan, hat, and sunglasses.

Rihanna in Hawaii (facebook.com/rihanna)

Weren't invited to join Rihanna and her entourage on a trip to Hawaii earlier this year? Not to worry, the Barbadian beauty is sharing her vacation photos.

Newly-engaged Baldwin and Thomas. (Olycom/X17online.com)Now that's amore. Alec Baldwin and his new fiancée Hilaria Thomas packed on the PDA during a getaway to Rome this week. Forget holding hands, the two lovebirds — who just got engaged in early April — were so caught up in the romance of the Italian capital, the "30 Rock" star even dipped Thomas and gave her a giant smooch right in the middle of a crowded street! And the excitement was mutual. "Good food, vino, cafe, familia, museums, siestas … I can't wait," the 28-year-old yoga teacher tweeted just before they took off from their New York City home base.

Blue Wasp/Grey Wasp/Splash NewsSinger Rihanna, 24, and model-turned-actress Brooklyn Decker, who turns 25 on Thursday, have become fast friends while promoting their upcoming big-budget film "Battleship." The ladies were even snapped sharing a hug while cruising Australia's famous Sydney Harbour on Monday. Decker was outfitted in a red dress, while RiRi, who's known for her sometimes wacky style, donned a denim button-down over denim shorts. Perhaps they've become close because they're the only two women in a cast of men, including "Friday Night Lights" hottie Taylor Kitsch, sexy Alexander Skarsgard from "True Blood," and the always dapper Liam Neeson from, well, just about everything.

Spread/X17online.com

Sure, some rock stars are busy dating multiple women, dabbling in drugs, and trashing hotel rooms, but Jersey boy Jon Bon Jovi has somehow managed to avoid all of that (despite being in the same band as Richie Sambora) and stay a family man over the last two decades.

Steven Tyler celebrated with fiancee Erin Brady (left) and daughter Liv. (Shook/Sweedler/Splash News)

Steven Tyler was the man of the hour over the weekend when his family gathered in Hawaii to mark the Aerosmith frontman's 64^th birthday (which was actually March 26). Donning a pinstripe suit, orange button-down shirt, blue painted toenails, and his signature oversized sunglasses, Tyler celebrated his birthday with a dinner at Maui restaurant Mama's Fish House, where he was joined by fiancée Erin Brady, his daughter Liv, and his grandson Milo, Liv's 7-year-old son.