The Boy Meets World alum was spotted enjoying time with singer Chilli on a Waikiki beach in Hawaii ... a show in Hawaii," a rep for Chilli told E! News. "They've been touring all summer ...

Fate played a role in bringing TLC singer Chilli and "Boy Meets World" alum Matthew ... However, later, in a March 15 interview with E! News promoting his new podcast called "Brotherly Love ...