"We Are Young" might be giving "Call Me Maybe" a run for its money as reigning champion of awesome YouTube covers. A slew of entertaining amateur renditions -- from a capella to orchestral -- has kept the hit single by fun. going strong, and now, the ultimate mash-up, "'We Are Young' Cover Party," is bringing together 43 of the best versions on the interwebs. The videos feature girls and guys, both solo and in groups, and instruments ranging from piano to violin to ukelele to flute.

While we don't like to play favorites, Pentatonix's epic a capella rendition is definitely one of the most impressive of the bunch. You can watch it below. (Skip to 1:09 for a preview!).

Which cover do you like the best? Which is the bigger summer anthem: "Call Me Maybe" or "We Are Young"? Tell us in the comments below or tweet @HuffPostTeen!

(H/t Buzzfeed)