Yes. "All Star" by Smash Mouth is officially confirmed for the Stage Tour setlist.
Setlist record
This is named song #24 in the wiki's announcement-order database. It entered the public list in Setlist Reveal #7 on 2026-08-12, alongside "In the Stars" and "Starlight".
Reveal and genre context
Reveal #7 added 3 named tracks. Within the 25 songs announced so far, "All Star" is one of 9 records classified by this wiki as Alternative Rock. Genre is an editorial browsing label, not an official chart attribute.
Gameplay
Stage Tour supports Lead Guitar, Groove Guitar/Bass, Drums, Vocals, PC Keyboard and gamepad. The official announcement has not published this song's chart difficulty ratings or per-instrument chart details.
Related songs
Official source
FAQ
Is All Star in Stage Tour?
Yes. It is marked Confirmed because it appears in an official Stage Tour Newsroom setlist reveal.
What difficulty is it?
Its per-instrument difficulty has not been announced.