Squeak sound while coming down off high rpms

if i rev the engine up, while its coming down there will be a squeak, and sometimes happens while im in the high rpms itll squeak a little bit, im getting close to an oil change so that might be it? and sometimes ive been in 2nd and when it gets up in he rpms it makes a loud squeak sound, really really noticable any help?

Bump ToThe Max

belts squeak especially when there too tight

its a new sound, like as of the past few weeks,so could the belts tighten all of a sudden?