This week we're recovering fromLollapaloozaafter three days and in the sun and storms of Chicago, IL. We also travel back to the birth of a genre in honor of one of those that made it great. And finally, we showcase a Bob Marley & The Wailers classic, re-released today in support of Save the Children's East Africa campaign. You'll find all this and more onyoutube.com/music, where each day we serve you up the tastiest morsels from the world of music video. Lollapalooza 2011 Twenty years ago Perry Farrell founded the traveling circus of a festival that was Lollapalooza. Now with its roots firmly planted in Chicago, the three day extravaganza continues to grow, mixing the biggest names in music with a dizzying array of bright young stars. This year YouTube brought the festival to the world, live streaming 39 great acts from across the weekend including headliners Coldplay, My Morning Jacket and the Foo Fighters. Check out some highlights in the playlist below. Old-School Hip-Hop In music, you gotta know your history and appreciate the artists who laid the foundation for today’s tunes. Today isKurtis Blow’sbirthday, which put us in mind of the golden age of hip-hop when rap battles on your front stoop, wheels of steel and gold chains were the rage. To celebrate an era whose influence is still resonating today, we put together a playlist of the best videos of the era from folks like the Fat Boys, RUN-DMC, Slick Rick and the Sugar Hill Gang. The music holds up, and trust us—so does the fashion. High Tide or Low Tide A devastating food crisis continues to impact millions of children and their families across East Africa. Today, Save the Children and the Marley family re-release the 1973 song 'High Tide or Low Tide' to raise funds for food, water and medicine. The project is supported by Lady Gaga, Beyonce, Justin Beiber and many others in the entertainment industry, and the video was crafted by Oscar winning director Kevin Macdonald. Tim Partridge, Music Marketing Manager, recently watched "LisaNova Does Royce da 5'9 Tinie Tempah Foster the People, Ellie Goulding & Mayer Hawthorne."