Last week Trey Songz celebrated his 31st birthday with a surprise mixtape for his fans! The mixtape titled, To Whom It May Concern, includes 12 tracks written and produced by numerous artists and features names like Dave East, MIKEXANGEL, Chisanity and J.R. One of the tracks on the mixtape that really stands out on the mixtape is a smooth, banger titled “Used To”. The track, which features by a verse by one of Trigga’s artists J.R., is about rekindling a past relationship. ‘I know it ain’t right, but why can’t you come with me tonight? i know I’m too late but let’s roll one up for old time sake,” he croons over the DJ Drama production. Other tracks on the mixtape include “Waffle & Eggs”, “Crew” and “Benihana”. If you haven’t check out To Whom It May Concern it’s time to get familiar! Check out “used To” featuring J.R. below!