Wikipedia
 

If not on wikipedia, where can I find popular music like Coldplay, Eminem, rihanna, ect… release history but to radio? Some information I cannot obtain on wikipedia then where else online? Their music label like EMI, geffen, ect…?

You could check the artists' websites or social media accounts on Facebook and the like. You could try www.allmusic.com or www.discogs.com. A Google search would probably reveal all sorts of resources for what you're after.

maybe reddit and lemmy.