Last week, we rounded up some of the likely big names for this year's Outside Lands lineup, which included Paul McCartney, Phoenix, the Red Hot Chili Peppers, and Baauer.
The lineup will be announced tomorrow. But before then, festival organizers have been dropping hints on Instagram. Based on those not-so-subtle clues, other acts performing this year will be Grizzly Bear, the National, Willie Nelson, Jurassic 5, and more. Check out the full list of clue leaks below.
Here are some other artists all but certain to perform at Outside Lands 2013:
Young the Giant
The Tallest Man on Earth
Twenty One Pilots
Add those to our original estimates, and a pretty solid lineup is taking shape:
Red Hot Chili Peppers