New Kids on the Block Good Genes or Good Docs?

4/28/2013 12:30 AM PDT
0405_nkotb_good_genesNew Kids on the Block have got the right stuff.

Here's Danny Wood, Joey McIntyre, Donnie Wahlberg, Jordan Knight and Jonathan Knight during their boy band heyday in 1989 (top) -- and 24 years later, Joey, 40, Danny, 43, Donnie, 43, Jordan, 42, and Jonathan, 44, in NYC recently (bottom).

They're hanging tough.