Kim Kardashian and Kourtney KardashianLeave it to those Kardashians to use partying tactics to teach life lessons. On 'Kourtney and Kim Take New York', the whole family was together to help Kim Kardashian celebrate her 30th birthday. And apparently, she's having a hard time with being so ancient.

So Kourtney Kardashian, who's 31 and doing just fine thank you very much, decided to help Kim realize that she was still young enough to loosen up and live a little. And how does one give such pearls of wisdom to one's younger sister?

"We are all gonna do a keg stand," Kourtney announced to the room. "Kim is gonna do this!" Watch the video after the jump.