Watching guys run up walls and fling themselves from crazy high places and land on their feet is undeniably sick. Seeing it happen live is even sicker. If you’re not watching “MTV’s Ultimate Parkour Challenge,” live Thursdays at 10:30/9:30c on MTV, then get involved. It’s like skateboarding without the skateboard. Except it’s on top of buildings.

Check out the premiere episode of “MTV’s Ultimate Parkour Challenge” in the video below and download the show’s theme song, “Jackie Come Lately,” by Los Angeles band Heavy Young Heathens. You know what? While you’re at it, download their entire Make Room for the Youth EP. And don’t miss the all-new episode tonight at 10:30!

On tonight’s “True Life: I Hate My Plastic Surgery,” you’ll meet two young people who’ve gone under the knife and come out from the experience mired in regret. It’s serious decisions met with serious consequences. All of the songs you’ll hear in “True Life: I Hate My Plastic Surgery” — which takes an in-depth look at life-altering changes — are by Austin alt-rock band Alpha Rev. And all of Alpha Rev’s emotional, moving music perfectly matches the somber tones of the episode.

Even if you haven’t experienced plastic surgery you wish you could undo, Alpha Rev’s lead singer-songwriter Casey McPherson explains how anyone can relate to the band’s music and the story of the two people who’ve chosen to share their story with “True Life.”

“All our songs are about the human experience, and our journey to become free,” McPherson explained. “Life throws us all kinds of curveballs, and sometimes we just need to understand that it’s all going to be OK and we’re beautiful just the way we are made. Music has brought me that connection, and I hope our songs do the same for others.”

Watch two videos by Alpha Rev — “Colder Months” and “New Morning” — and a live performance of “When Did I Wake Up.” Plus, watch a sneak preview of “True Life: I Hate My Plastic Surgery.” Then watch the show tonight at 10/9c.

1.) Nirvana, “In Bloom”
For the video for this classic off of Nevermind, Nirvana paid homage/lampooned the legendary appearance of The Beatles on “The Ed Sullivan Show,” complete with hysterical screaming fans.

2.) Weezer, “Buddy Holly”
Weezer and Spike Jonze ingeniously inserted the band’s performance into an episode of “Happy Days,” with attention paid to the smallest detail, right down to the film stock.” Sit on it!”

3.) Outkast, “Hey Ya”
For Andre 3000’s hip-hop-power-pop anthem, the Atliens also used an “Ed Sullivan Show”-type of setting, albeit a show hosted by Ryan Phillppe of all people. However, unlike Nirvana’s clip, “Hey Ya,” is set in London during the Mod heyday.

4.) The Strokes, “Last Nite”
In this Roman Coppola-directed clip, the New York band performs their classic single on a ’70s-era live performance show, not unlike “Don Kirshner’s Rock Concert.”

5.) The Futureheads, “Heartbeat Song”
The latest in a crop of retro TV fake-outs!

This video, titled “Marketing,” finds Witzigreuter reunited with his label boss and comedy co-conspirator Pete Wentz. It seems the Decaydance chief has discovered the fact that lots of stuff (music) is available for free on the Internet. His measured, appropriate response? Start merchandising and marketing everything to make up for the loss of sales.

Witzigreuter wants to sell hoodies. Wentz wants him to sell…his kidneys. You can see where this is going. Check out the new video, as well as the other two sketches, below for the hilarity.

Before she was Lady Gaga, international pop icon, Lady Gaga was just another struggling artist, down and out on New York City’s Lower East Side, trying to make ends meet. So it’s only natural, now that she’s “kind of like a big deal,” that we’re starting to get a peek into her past life.

One of the most amusing things that’s popped up so far is, “The Portal In The Park,” a children’s audio book by Cricket Casey, with music by hip-hop legend Melle Mel.

“Portal…” is about a boy named Scott who, “accidentally falls through a portal and takes a scary journey into another dimension inhabited by creatures who attempt to destroy his spirit.” Sounds kind of like how one feels watching one of Gaga’s videos!

The Lady added vocals to with Melle Mel’s music on the audio book, and the vocals are unmistakably Ms. Germanotta’s. Of course the most hilarious thing here is, given the outrage from some sectors over Gaga’s “Telephone” video and the detrimental effect some believe it could have on children, Lady Gaga has quite a long history affecting the minds of little ones. Who knows, maybe one day they’ll start watching “Telephone” instead of “Dora The Explorer.” Or maybe not.

+ Listen to a clip of Lady Gaga’s “Portal In The Park” children’s book song.

Yesterday we told you all about the San Diego rock band The Soft Pack. And as if our ringing endorsement weren’t enough, the cast of the highly-anticipated film “Kick Ass“ went and made their own video to The Soft Pack’s song, “Answer To Yourself.”

“Kick Ass,” which follows a rogue band of outsider teens who invent superhero alter egos and beat up bullies is adapted from the much-beloved Mark Millar (“Wanted”) comic. It stars Christopher Mintz-Plasse (“Superbad”), Clark Duke (“Hot Tub Time Machine”) and Chloe Moretz, along with Nicolas Cage and Aaron Johnson).

Duke, Mintz-Plasse and Moretz are the stars of this Mean Video directed by Kashy Khaledi. The video turns The Soft Pack’s droning anthem on its head as the “Kick Ass” stars reference their film characters and get involved in the kind of food fight where heavy weaponry, martial arts, milk and flaming Twinkies are all fair game.

“Kick Ass” is in theaters April 16th. Read more about The Soft Pack here. Check out the kick-ass version of “Answer To Yourself” below, and check out photos of the “Kick Ass” cast on the “Answer to Yourself” video set.