Murs recently broke the Guinness World Record for the longest rap marathon by spitting for 24 hours straight. While that seems like a major feat, not everyone is impressed. Rapper Supernatural is not only calling out Murs saying his record is essentially not legit, but he is also saying he will break the record.

At 9 a.m. PST on Wednesday (Oct. 12), Boost Mobile’s Where You At LA? host embarked upon his quest, which included a rap karaoke tour de force the likes of which we’ve literally never seen before. Murs rapped his way through just about every mid-1980s and 1990s rap classic in the book, showcasing an impressive mix of endurance and stylistic malleability in the process. Throughout the marathon, the seemingly inexhaustible Murs effortlessly mimicked legendary rappers as he performed their timeless songs without missing a beat.

But Supernatural is not dazzled. He recently took to Instagram for a quick venting session, implying that Murs took his idea and also vowed to top the record. "I will only deal with facts this is the LIL homie congrats on your world record?," started. "I had conversation with Murs last year about setting a new world record called 24 the freestyle marathon at the house of blues back stage he thought it was a dope idea so dope he changed the concept and ran with it before I could make my attempt."

He continued, "This is a example watch who friends are. I hope you all understand this was a karaoke world record not FREESTYLE ...! I have love for this game but I have to speak up for myself. I will still go for a new world record but it will be freestyle and it will be done in style ...! Mc Supernatural ....! The truth will set you FREE now watch me FLY..!!!!!!!#2?hourfreestyle."

It should be noted that Murs' record is for "marathon rapping" and not freestyle. Actually, the Guinness World Record for the longest freestyle belongs to Chiddy, of the group Chiddy Bang, who freestyled for over nine hours back in 2011.

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