Kendall and Kylie Jenner Slam Underage Drinking Reports: "Shut Up With These Stupid Rumors and Stories!"

Sister are tweeting mad about recent gossip

Kendall Jenner and Kylie Jenner are tweeting mad about recent tabloid reports that they went out in Hollywood for a night of underage drinking.

The sisters took to Twitter today to slam the false rumors, which surfaced last week after they attended the Day by Day fashion show with Scott Disick then hit the show's afterparty with Khloé Kardashian Odom.

"I am so done with everyone making my little sister and I out to be something that we are not," Kendall posted today. "Shut up with these stupid rumors and stories. No one has fake ID's and no one's partying. we know that's what all you slimy media people want to see but that is not going to happen."

She continued, "We're smarter than that, we have goals and personally I think it's sad that some people sit at their desk making things up......about girls that are trying to have a career just like everybody else. get over it. no story here. On another note, I got a new Great Dane puppy and she's awesome!"

As for Kylie, she wrote, "Bout to be straight up because I'm sick & tired of the rumors this past week..I'm sorry to disappoint, but Kendall & I will not grow up to be let downs. I know that's what some people would unfortunately like to see...but I'm not going to sit around and let grown adults create untrue stories about me underage drinking & partying every night with a fake I.D. And F.Y.I. regarding the 'club nights', I was with my father & family supporting my brother and sister-in-law. We can stop with all the stories now. And to all the young girls out there just like me, carry yourself with class and dignity and don't let ANYONE determine your future."

After the partying reports surfaced last week, mama Kris Jenner spoke out to defend her daughters, calling the whole thing a "big misunderstanding."

"They thought it was a private party after the fashion show," she tells us. "They were told the club was rented out for the night."

"The girls don't have fake IDs and they don't drink," the Keeping Up With the Kardashians star added. "Khloé would never bring them to a club. The girls thought they were walking into a private event that they were paid to attend as part of a personal appearance as part of a fashion show afterparty...The girls don't possess or own a fake ID."