In case people were interested in the peaks of the biggest radio songs this year according to Neilson Sound Scan (which Billboard uses):
228.9M Blurred Lines
171M Royals
168M Roar
159M Mirrors
151M Wake Me Up
149M Locked Out Of Heaven
149M When I Was Your Man
142M Get Lucky
137M Just Give Me A Reason
136M Stay
135M I Knew You Were Trouble
135M Can't Hold Us
128M Holy Grail
125M Hold On, Were Going Home
123.9M Radioactive
121M Demons
120M Thrift Shop
I didn't include The Monster because it may go higher after the year-end countdowns are done, and I may have missed some other songs too
Here's TM & CS peaks so far but they will go up most likely and peak in 2014
146M The Monster
132M Counting Stars
Edit: I added Demons but I'm not sure if it got any higher the following week but that was the last numbers Billboard posted for it :/