Lovers in the backseat!

Selena Gomez turned 19 on Friday, and after spending the entire weekend with boyfriend Justin Bieber, he posted this adorable shot of the duo sharing a kiss in the backseat of their car.  Justin uploaded the pic on Instagram and wrote, “Happy bday baby.”  Awww!

Justin Bieber Selena Gomez birthday kiss

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So what else did the teenage supercouple do over the weekend?  They were spotted at Disneyland on Friday cleaning out the park's gift shops, and they later made it back to Hollywood for a fancy dinner at Geisha House in Hollywood.  And that's not all!  Justin also made a surprise appearance during Selena’s concert at the Pacific Amphitheatre in Costa Mesa on Sunday, where he serenaded his lady love with a rendition of Justin Timberlake's hit, "Cry Me a River"!

Seems like these two lovebirds are still going strong!  Think they'll last?

Photo courtesy of Instagram