Tom Cruise may be close to 50-years-old, but his body has never looked better. The ab-tastic A-lister was recently spotted showing off his chiseled chest on the set of Mission Impossible 4 in Prague. While Tom's fit form may have come as a surprise to a few people, the star has always maintained a rock-hard body. Exhibit A: Tom's oiled up shirtless volleyball scene in Top Gun. Though Tom was 24-years-old when Top Gun was released, his chest doesn't look much different from the hot bod he is currently sporting. Slap on some dog tags and pair of aviators and Tom looks.....