What Happens in Vegas

History -- make that high school -- may repeat itself when Marni learns that Joanna, the mean girl from her past, is set to be her sister-in-law. Before the wedding bells toll, Marni must show her brother that a tiger doesn't change its stripes. On Marni's side is her mother, while Joanna's backed by her wealthy aunt.

Altruistic Jane finds herself facing her worst nightmare as her younger sister announces her engagement to the man Jane secretly adores.

All the couples are back for a wedding in Las Vegas, but plans for a romantic weekend go awry when their various misadventures get them into some compromising situations that threaten to derail the big event.

Two best friends become rivals when their respective weddings are accidentally booked for the same day.

Sidney and Dre can attribute their lifelong friendship and the launch of their careers to one single childhood instant... witnessing the birth of hip-hop on a New York street corner. Now some 15 years later, she is a revered music critic at a national magazine and he is a successful, though unfulfilled, hip-hop record company executive. Both come to realize that their true life passions will only be fulfilled by remembering what they learned that day on the corner.

Longtime single friends, Ben and Alice, agree to be each other's respective plus one at every wedding they're invited to, during a busy summer of wedding fever.

A spirited young bride-to-be living with her single mother on a small Greek island secretly invites three of her mother's ex-boyfriends in hope of finding her biological father to walk her down the aisle.

A romantically challenged morning show producer is reluctantly embroiled in a series of outrageous tests by her chauvinistic correspondent to prove his theories on relationships and help her find love. His clever ploys, however, lead to an unexpected result.

After an amazing first date, Bea and Ben’s fiery attraction turns ice cold — until they find themselves unexpectedly reunited at a destination wedding in Australia. So they do what any two mature adults would do: pretend to be a couple.

Reuben Feffer is a guy who's spent his entire life playing it safe. Polly Prince is irresistible as a free-spirit who lives for the thrill of the moment. When these two comically mismatched souls collide, Reuben's world is turned upside down, as he makes an uproarious attempt to change his life from middle-of-the-road to totally-out-there.

Ever since her father drilled into her head that monogamy isn't realistic, magazine writer Amy has made promiscuity her credo. As much as she enjoys an uninhibited life free of commitment, Amy is really in a rut. While writing a profile about charming and successful sports doctor Aaron Conners, she finds herself actually falling in love for the first time -- and what's more, Aaron seems to really like her too. Amy starts to wonder if it's time to clean up her act and face her fears.

London bookstore owner William Thacker's quiet life turns upside down when a chance encounter with famous actress Anna Scott sparks an unlikely romance challenged by their vastly different worlds.

When she receives word that her longtime platonic pal Michael O'Neal is getting married to debutante Kimberly Wallace, food critic Julianne Potter realizes her true feelings for Michael -- and sets out to sabotage the wedding.

Eddie, the 40-year-old confirmed bachelor finally says "I do" to the beautiful and sexy Lila. But during their honeymoon in Mexico, the woman of his dreams turns out to be a total nightmare, and the guy who could never pull the trigger realizes he’s jumped the gun.

Intertwining couples and singles in Los Angeles break-up and make-up based on the pressures and expectations of Valentine's Day.