The Lord hath picked up the cup yet again!

In the last year, Scott Disick appeared to have cleaned up his act, but he's back to being a party animal, and it's causing real tension with his baby mama Kourtney Kardashian. The reality star is currently at the Sundance Film Festival, and to say he's burning the midnight oil would be an understatement!

"He had a wild party back at his house, where lots of girls were in the hot tub," a source dished to Page Six, noting that the father-of-three has been staying up till 7 a.m. every night and then sleeping all day.

This behavior is not sitting well with his former girlfriend, as she was actually considering getting back together with him until recently.

"Scott took off to Sundance because Kourtney freaked out on him as soon as he returned from Dubai, and he told her that he doesn’t want to deal with it. He just does not care what she thinks right now!” a source dished to Radar.

"He lies to her about getting wasted when he goes out of town. Kourtney is just so frustrated and aggravated that whenever the two of them make progress, he has to go and mess it all up. She will never be able to trust him and he knows this," the source added.

Even so, we'd rather hang out with boozy LD than boring Kourtney K!