Rapper made promise in interview with pro-legalisation news anchor
The post was deleted from both platforms shortly afterwards
The rapper shared a clip of the new track in a new vlog
Snoop Dogg and Mark Ronson were set to headline two-day event this weekend (August)
Rapper talks drug use with Jimmy Kimmel
Inaugural festival takes place in Silverstone Woodlands in August
A$AP Rocky, Katy B and Rudimental also played the opening day of the Heaton Park festival
Rapper and actor viewed HBO drama together while guests on web series 'Nemo Hoes'
The rapper has added his own commentary to the computer game
The rapper will top the bill of the Cornwall event along with Chase & Status and Bastille