Fortunately I have avoided Soulja Boi and only heard him thanks to Encyclopedia Dramatica.
I hate all of Rihanna's songs (SOS ripped the keyboards from Tainted Love... HERESY), but I wouldn't mind metting her... but I digress...
The worst songs I have ever heard include almost everything by Bon Jovi, Trivium, Bullet for my Valentine, My Chemical Romance, 50 Cent, also The Reason by Hoobastank, anything by Simple Plan or Dashboard Confessional, and I might still be missing some...
Oh yeah, and Gonzales's version of Roger Glover's Love is all... All of the guest singers (Nina Hagen, Jacques Higelin, Matthieu Boogaerts, Micky Green, and others I don't know) sing weakly, without sustaining the notes, the instrumental is hyper minimalistic compared to the original, and basically it feels like you emasculated Dio and made him hum instead of sing...
I hope Roger Glover got paid A LOT to agree to this piece of crap being made, copyrighted and broadcasted... And Gonzales lost all my respect for composing this weak thing...