Tamo Aí na Atividade (Portuguese for "Here We Are, Up to Something") is the sixth studio album by Brazilian alternative rock band Charlie Brown Jr., released in December 2004 through EMI.

The band's first album since 1999's Preço Curto... Prazo Longo to be produced by Rick Bonadio, it spawned the hit singles "Champanhe e Água Benta" and the titular "Tamo Aí na Atividade".

The recording sessions of Tamo Aí na Atividade were plagued by creative divergences and clashes between vocalist Chorão and his bandmates, which led to a deterioration of the relationship between them.

In 2005, shortly after the album's release, Champignon, guitarist Marcão and drummer Renato Pelado all left Charlie Brown Jr., and Chorão put the band on hold for a brief period of time before reactivating it with a new line-up.

Anderson Nascimento of Galeria Musical gave the album a positive rating of 4 out of 5 stars, praising the inclusion of electronic beats and interludes and Rick Bonadio's "competent production".