Fans watch Tom Petty in the pouring rain [photo: Jason Merritt/Getty Images]

The final day of Manchester, Tennessee's Bonnaroo festival didn't disappoint, with crowd-pleasing sets by indie-rock supergroup Divine Fits, alt-rock darlings the National, thrift-shopping/tag-popping hip-hop duo Macklemore & Ryan Lewis, and many more. Less crowd-pleasing? The rainy weather, which probably had a lot of festival-goers wishing they hadn't squandered the last of their pocket money at the henna-tattoo and body-painting booths. D'oh!

But fans weren't going to let anything rain on their rock 'n' roll parade. Good times were still had by all, and listed below are the highlights of a literally thunderous Bonnaroo day four.

photo: C. Flanigan/Getty ImagesEd Helms's Andy Bernard character didn't fare too well when he tried to kickstart his singing career on "The Office," but in real life, the "Office"/"Hangover" actor seems to be doing just fine in the music world — if the random participation of buzz band the Lumineers, during Ed's Saturday afternoon appearance at Bonnaroo, is any sort of endorsement.

"Thank you for coming to the only band worth seeing here. That's not a diss; it's just a fact," declared cult psych-rocker Ariel Pink at the start of his Thursday set at Manchester, Tennessee's Bonnaroo festival. Ariel definitely put on a good show, but he was wrong: There were many acts worth seeing on Bonnaroo's first day, like British buzz bands the Vaccines and Django Django, and American up-and-comers like Twenty One Pilots and Capital Cities.

However, these were the random magic moments (besides Paul McCartney's surprise soundcheck and the Polyphonic Spree's raucous Rocky Horror tribute) that really stood out on Bonnaroo day one:

A prop handed out at the 'Trapped' screeningThursday night at Manchester, Tennessee's Bonnaroo festival included a Cinema Tent screening of The Rocky Horror Picture Show (preceded by a live performance of the Rocky Horror soundtrack by the Polyphonic Spree). But another Bonnaroo Cinema screening on Thursday was so awesome, it's possible that a new-school celluloid musical may soon usurp Rocky Horror and become THE must-see midnight-madness movie.

That movie, dear readers, was R. Kelly's harrowing, hip-hoperatic tale of passion and betrayal, Trapped in the Closet.