Black Sabbath, Jack White, Red Hot Chili Peppers, Frank Ocean, and many more: here's your front-row ticket to Chicago's biggest fest.

3. Black Sabbath

3/52

4. Red Hot Chili Peppers

4/52

5. Red Hot Chili Peppers

5/52

6. The Black Keys

6/52

7. The Black Keys

7/52

8. Frank Ocean

8/52

9. Metric

9/52

10. M83

10/52

11. The Shins

11/52

12. First Aid Kit

12/52

13. Avicii

13/52

14. The Afghan Whigs

14/52

15. Passion Pit

15/52

16. SBTRKT

16/52

17. Bassnectar

17/52

18. Bassnectar fans

18/52

19. The Head & the Heart

19/52

20. Dawes

20/52

21. Die Antwoord

21/52

22. Porter Robinson

22/52

23. Tame Impala

23/52

24. Dev

24/52

25. Band of Skulls

25/52

26. Weather Evacuation

26/52

27. Delta Spirit

27/52

28. Santigold

28/52

29. fun.

29/52

30. Calvin Harris

30/52

31. JEFF the Brotherhood

31/52

32. Franz Ferdinand

32/52

33. The Weeknd

33/52

34. Givers

34/52

35. Neon Indian

35/52

36. Skream & Benga

36/52

37. Jack White

37/52

38. Jack White

38/52

39. Florence + the Machine

39/52

40. Justice

40/52

41. At the Drive-In

41/52

42. Polica

42/52

43. The Gaslight Anthem

43/52

44. J. Cole

44/52

45. Dum Dum Girls

45/52

46. The Walkmen

46/52

47. Gary Clark Jr.

47/52

48. The Big Pink

48/52

49. Childish Gambino

49/52

50. Sigur Ros

50/52

51. Miike Snow

51/52

52. Little Dragon

52/52