Bill Oddie is 4, Russ Abbot is 3, Tim Minchin is also a 4.

What am I talking about? Number of degrees from Vince Gill, the musical version of Kevin Bacon.

http://www.6degreesofvincegill.com/

I thought the Barry Cryer one was a bit dubious though and the cartoon character Betty Boop (who must have produced a record) isn't listed.

He's known as the nicest guy in Nashville, as he's always on other people's records, so I'm not surprised he's connected to everyone. Well, the Bill Oddie thing surprises me. I mean, Bill Oddie?