“Weird Al” Yankovic has been pumping out parodies for 30 years, but he looked ageless at the Riverside Theater Saturday night, dressed in his trademark Hawaiian shirt with his mane of curly hair flying around as he energetically plugged away on his accordion. Accompanied by the same band he’s had since the early ’80s, he started the set with “Polka Face,” a medley of current hits by Lady Gaga, Pink and Justin Bieber, among others, set to a waltzing polka beat.

The band made costume changes for nearly every song, going grunge for “Smells Like Nirvana” and climbing into yellow jumpsuits and red plastic hats for the Devo-esque “Dare to Be Stupid.”

The audience, which proved to be almost as entertaining as the onstage antics, ranged from hyper elementary-school kids to confused-looking senior citizens. There was also a dedicated fan base in their mid-adult years singing along and dancing in their seats.

Yankovic imitated Green Day (“Canadian Idiot”) and James Blunt (“You’re Pitiful”) while stripping through layers of clothing, ending up in a SpongeBob SquarePants T-shirt, tutu, heart-print boxers and fishnet stockings.

Such an extensive catalog of satireled the band to try to cram several songs into a long medley, including early hits like “Another One Rides the Bus” and more recent songs like “Gump.”

The costume changes continued, with fake beards for “Amish Paradise” and a Michael Jackson-themed fat suit for “Fat.” For his latest big hit, “White and Nerdy” (a Chamillionaire parody), Yankovic rapped while zipping around the stage on a Segway.

He also played all of the songs from his most recent recording, an EP titled Internet Leaks, which includes his take on T.I., The Doors and The White Stripes.

Two hours of weird hits were not enough for the audience, which demanded an encore. Yankovic returned to the stage dressed as a Jedi and delivered two Star Wars-themed selections: “The Saga Begins” (a take on “American Pie”) and an extended version of his classic “Lola” spoof, “Yoda.”