Taylor Swift and Calvin Harris went to the Haim concert at the Troubadour in West Hollywood on Thursday evening, and when they left the venue via the back exit, we snapped the super hot couple holding hands! The duo both wore black leather jackets, and when they hopped in a chauffeured SUV after the show and headed to her place, they couldn't stop giggling. Ahh, the honeymoon phase.

As you may know, the Haim sisters introduced Taylor and Calvin, and even though he had previous stated that she wasn't his type, it looks like he fell for her pretty fast! Last week the couple were spotted getting all touchy feely at Kenny Chesney's Nashville concert, and just three weeks ago rumors started popping up that the two were an item, so this is VERY new.

Of their relationship, a pal tells Us Weekly, "He's attracted to her and she thinks he's hot! He is the No. 1 artist in his world and she is in hers. She needed an older guy who understood her and is a workaholic just like her."

The way we see it, one of two things are going to happen -- these two are going to get married and live happily ever after, or it's not going to end well and she's going to create an entire album worth of content about their split. Wonder what it's going to be?