Chance the Rapper has scrapped more gigs in the U.S. as he battles exhaustion.

The hip-hop star pulled out of a performance at Scotland's T in the Park music festival last month (Jul14), and cancelled a show in Alabama in May (14) because of a mystery illness. He also scrapped his second weekend performance at the Coachella festival in California in April (14) after being hospitalised.

Now he has announced he will not be performing at the Mad Decent Block Party gigs in Philadelphia, New York, Boston and Toronto. He will be replaced by Vic Mensa at all four shows.