Comedian Gallagher suffered a heart attack just as he was preparing to perform in Texas last night, TMZ reports. The 65-year-old watermelon smasher is expected to remain hospitalized for a few days; his manager called it "mild to serious." Last year, the comedian suffered a minor heart attack and collapsed onstage. Gallagher of late has run into controversy over jokes seen as racist and homophobic, notes the Wrap, which also points out his rarely used first name: Leo. (More Gallagher stories.)