The hottest new song at Modern Rock belongs to AJR's "Sober Up." It's shaping up to be a very special record as Shazams are happening all over the country and the track will be inside the Top 20 next week.

The hottest new song at Modern Rock belongs to AJR's "Sober Up." It's shaping up to be a very special record as Shazams are happening all over the country and the track will be inside the Top 20 next week.