Ahhhh, spring. Flowers are on the trees, butterflies are in the air, ski slopes are shutting down, and this weekend, carfuls of hipsters are heading down to Coachella.

Which means only one thing: Festival season has arrived!

In just four short months, the mother of San Francisco musical extravaganzas will take over Golden Gate Park, and in less than one short week, the official Outside Lands lineup will be released.

But why wait a second longer? HuffPost SF was lucky enough to talk to an anonymous tipster connected with festival organizers, who told us a handful of the acts we can expect this year. Our friends at SF Station and SF Weekly have also been playing the guessing game, and their predictions appear to measure up.

From nineties rock heroes and an R&B superstar to Europe's hottest new DJ and a legend who needs no introduction, Outside Lands 2013 is shaping up to be the best year yet.

Take a look at the rumored performers below, and stay tuned for the full lineup on April 16. In the mean time, you can also visit Ranger Dave's Instagram page for clues.

Loading Slideshow...
  • Paul McCartney

  • Red Hot Chili Peppers

  • Nine Inch Nails

  • Phoenix

  • The National

  • Willie Nelson

  • Wavves

  • Chromatics

  • Tallest Man on Earth

  • Zedd

  • Grizzly Bear

  • D'Angelo

  • Phoenix

  • Kaskade

  • Vampire Weekend

  • Pretty Lights

  • Yeah Yeah Yeahs

  • D'Angelo

  • Hall & Oates

  • Young The Giant

  • Band of Horses

  • The Head and the Heart

  • Yeasayer

  • Foals

  • Dawes

  • Twenty One Pilots

  • Dillon Francis

  • The Lone Bellow

  • The Mother Hips

  • Thao & The Get Down Stay Down

  • Camper Van Beethoven

  • The Soft White Sixties

  • Midi Matilda

  • Bhi Bhiman

  • Jurassic 5

  • Willie Nelson

  • A-Trak

  • Tallest Man on Earth

  • Matt & Kim

  • Jessie Ware

  • Surfer Blood

  • Chromatics

  • Rudimental

  • Bombino

  • Wavves

  • Fishbone

  • Milo Greene

  • Atlas Genius

  • Anuhea

  • Dumpstaphunk

  • Wild Belle

Also on HuffPost: