Billboard released its list of  “10 Greatest Rappers Of All Time” last week.

Snoop Dogg took to Instagram today (November 17) to express his frustration on Tupac not being included on the list.

“This is so disrespectful. !!” the Long Beach, California rapper writes under an image of Billboard’s list. “Whoever did this list need a swift kick in the Ass. No. Tupac. Come on cuz ?. Jus my opinion.”

Ghostface Killah was included on the list and took to the social media site to express his appreciation.

“Love to @billboard for having me on their Top 10 Greatest Rappers of All Time list,” the Wu-Tang rapper writes, also taking the time to promote his Rap app. “Think you one of the GOATs?? Go cop that @ispit16 app now and get your bars up #Billboard #Top10 #GOAT #Spit16 #BeSeenBeHeard.”

For additional Snoop Dogg coverage, watch the following DX Daily: