Drake and Lil Wayne recently collaborated on the track Believe Me, the lead off single from Wayne's forthcoming (and rumoured to be final) album Carter V. Now, the two hip-hop superstars are heading out on a mammoth US tour together this summer. These Young Money labelmates are arguably the genres two biggest names of the last decade, having both won critical plaudits and achieved dazzling commercial success. Drake's last record, the emotional Nothing Was the Same, topped a lot of 2013's Best Albums of the Year lists, while Lil Wayne has now had more entries on the Billboard Hot 100 than Elvis.