But fans of the two shouldn't worry because the two aren't the ones walking down the aisle this month. They are actually in town to attend the wedding of one of Gomez's close friend.
TMZ has reported that Gomez is the bridesmaid for her friend, Shannon Larossi's, wedding.
Prior to the wedding, Bieber and Gomez could be seen on a Cabo beach getting tanned and flirty with each other. Bieber could be seen snapping pictures of Gomez's toned body and relaxing with her by his side.
They also took time out from being playful with each other to play around with their cell phones.
Bieber, 17, was his casual self, wearing a pair of cut-off jeans while Gomez, 19, opted for a sexier look with a two piece blue bikini.
Paparazzi capture the two as they made their way from the airport in matching all black outfits. They were also photographed on the beach getting cozy and playful.
Gomez sparked rumors earlier that the two were engaged when she was seen wearing a ring on her engagement finger.
However, a representative told Us Weekly that the couple is not engaged.
Watch the two arrive in Mexico below: