Samantha's Summer Couple Pick-Will They Sizzle or Fizzle?

Leighton Meester and Justin Long

The Gossip Girl star and funny guy were first spotted together in May, but now things are really heating up between the two! Sources say they have been spending a lot of time together in the city this summer; after filming, Meester has been spending her off hours at Long's apartment on the lower east side. The couple met in 2010 when Meester had a small role in the romantic comedy, Going the Distance, starring Long and Drew Barrymore, who he dated on and off for many years. Things seem to be going well for the two but how long will it last? What do you think? Will this relationship sizzle or fizzle?