The official guidelines for speedy deletion are at Wikipedia:Criteria for speedy deletion. But if your article is on this list, I can promise you it will be speedily deleted:
Your unsigned rock band that doesn't meet WP:MUSIC. This is especially true of the band you started last week, and that's still looking for a bass player. It is also true of any artist or band that is "currently working on their first album/EP/mixtape". See Wikipedia:No one cares about your garage band.
Any article whose sole point is to announce that its subject is gay. See Wikipedia:Attack page.
Any article that begins, "Not much is known about..."