Only 2010 Camaros had any holes for the rear bow ties. They were just for positioning though, all model years they are held on with two sided tape. Most people use dental floss or fishing line to cut through the tape. Then use Goof Off to remove the adheasive left behind. There are other methods you can do a search on "Emblem Removal" and read other methods.
Cancer's a bitch! Enjoy life while you can! LIVE, LOVE, DRIVE...CAMARO!
The Bird is the word!