What's Up was released by American rock band 4 Non Blondes in 1992, with Linda Perry on lead vocals, and became one of the defining alternative rock hits of the early 1990s. Its anthemic chorus, built around the repeated question about what is going on, made it a lasting singalong long after its chart run. Decades later, the hook found a second life in short videos, reaction edits and nostalgic compilations, where a few seconds are enough to signal drama, irony or pure 1990s energy.