Question: I am having trouble locating the title of a Donald O'Connor movie from the '50s in which he did a song and dance on roller skates. Has this been released on video?

Answer: When people think dancing on roller skates, they think Gene Kelly in It's Always Fair Weather (1955), but you're looking for the musical I Love Melvin (1953). It isn't on DVD, but it was issued on video in 1995 and there are lots of used copies floating around. Donald O'Connor plays an assistant photographer who rashly promises to make a cover girl of chorine Debbie Reynolds, and his tap number on roller skates is a standout.