It's not uncommon to see Trey Songz and Drake together. The two young stars recently became spokesmen for Kodak's new So Kodak campaign. They routinely make appearances at each other's sold out shows and feature on each other's chart-topping songs.

The two may be one of the most successful BFF tandems in music today, but it wasn't always the case. Trey and Drake were friends in their struggling years. Back in '07, a burgeoning Trey appeared on little known Drake's single, "Replacement Girl." The video charted on "106 & Park," but did little to establish the rapper as a household name. That same year, Drizzy made a brief cameo in Trey's "Wonder Woman" video. Blink and you may have missed him. The clip debuted with a strong buzz, but quickly fizzled out. Three years later, the two are at the top of their games, which makes success that much sweeter, according to Trey.

It's ironic, man. God is good," the R&B singer told BET. "We're both very hard workers. We're getting what we deserve right now I feel and to be at the top, look to my side and see my homeboy who was in the trenches with me and we was in the bottom together, you know, it's something very special to have."