He's spent a year as the greatest pop star in the world ... we wanted to recap the Best of Usher so far: Our staff's picks for the 50 best songs from the man they call Ursher, baby through ...

And with his 15-minute, crowd-pleasing, decade-spanning set of classic hits, he reconfirmed his status as one of one of pop's greatest ... while most of Usher's biggest songs may have come pre ...