It seems to me that every artist or band I like is related to every other artist or band I like. To demonstrate this theory, let me present…

Six degrees of last.fm!

1. Pink Floyd: apparently my favourite band; every other artist/band must relate back to Floyd somehow…
2. Porcupine Tree: drummer Gavin Harrison is currently a member of King Crimson, alongside Tony Levin, who played bass on Pink Floyd’s A Momentary Lapse of Reason
3. The Police: guitarist Andy Summers has recorded two albums with Robert Fripp, who appeared on Porcupine Tree’s last studio album and EP
4. Genesis: former Genesis frontman Peter Gabriel worked with Police drummer Stewart Copeland on Gabriel’s album So, as well as collaborating with him for the track “Across the River”
5. Peter Gabriel: see above
6. Tom Petty and the Heartbreakers: Heartbreakers Mike Campbell and Benmont Tench have worked with Don Henley (as has former Heartbreaker Stan Lynch); Henley appears on former Pink Floyd bassist Roger Waters’ solo album, Amused to Death
7. Kate Bush: Bush has collaborated with Peter Gabriel several times, such as on the duet “Don’t Give Up”
8. David Bowie: the Robert Fripp connection is too easy, so instead I’ll note that frequent Bowie collaborator Brian Eno contributed to the Genesis album The Lamb Lies Down on Broadway
9. Fleetwood Mac: Stevie Nicks has worked with Tom Petty and the Heartbreakers so often that she’s considered an “honourary Heartbreaker”
10. Prince: appears on Kate Bush’s “Why Should I Love You?” and Stevie Nicks’ “Stand Back”
11. Talking Heads: Brian Eno (see Bowie) was almost the fifth member of Talking Heads, producing three of their albums (one of which—Remain in Light—gives him substantial writing credit)
12. Prince & the Revolution: see Prince
13. Lindsey Buckingham: member of Fleetwood Mac; has worked with Tom Petty and the Heartbreakers
14. Eagles: drummer Don Henley has worked with Stevie Nicks of Fleetwood Mac (”Leather and Lace”)
15. Roxy Music: guitarist Phil Manzanera co-wrote “One Slip” for Pink Floyd’s A Momentary Lapse of Reason
16. Yes: frontman Jon Anderson appears on the King Crimson album Lizard; King Crimson’s Robert Fripp is a frequent collaborator with former Roxy Music member Brian Eno
17. Hall & Oates: Daryl Hall appears on Robert Fripp’s Exposure; Fripp appears on Talking Heads’ “I Zimbra”
18. “Weird Al” Yankovic: Mark Knopfler plays lead guitar on Al’s “Money for Nothing” parody; Knopfler also features on Roxy Music frontman Bryan Ferry’s solo album Boys and Girls
19. Toto: Jon Anderson (Yes) appears on Toto’s The Seventh One
20. Sting: bassist for The Police
21. King Crimson: guitarist Adrian Belew appears on Talking Heads’ Remain in Light
22. No-Man: Mel Collins (King Crimson) appears on No-Man’s Flowermouth
23. The Cars: bassist Benjamin Orr appears on Joni Mitchell’s Chalk Mark in a Rainstorm, as do Wendy & Lisa (from The Revolution), Tom Petty and Peter Gabriel
24. Blondie: King Crimson’s Robert Fripp appears on Blondie’s “Fade Away and Radiate”
25. Marillion: former frontman Fish appears on Genesis keyboardist Tony Banks’ solo album, Still
26. Devo: Devo’s debut album was produced by Brian Eno (Roxy Music)
27. Elton John: Nik Kershaw appears on both John’s Ice on Fire and Still by Tony Banks (Genesis)
28. Tom Petty: obvious
29. Phil Collins: drummer for Genesis
30. Don Henley: drummer for the Eagles
31. Steve Miller Band: former member Boz Scaggs’ album Silk Degrees featured members of what would become Toto
32. Roger Waters: Toto guitarist Steve “Luke” Lukather appears on Waters’ album Amused to Death
33. Dire Straits: Sting features on “Money for Nothing”
34. INXS: “Original Sin” was produced by Nile Rodgers, who also produced David Bowie’s Let’s Dance
35. Supertramp: founding member Richard Palmer-James was the lyricist for King Crimson in the mid-’70s; furthermore, Pink Floyd’s David Gilmour appears on the title track from Supertramp’s Brother Where You Bound
36. U2: Brian Eno (Roxy Music) has produced many of their albums
37. Men at Work: longtime Hoodoo Gurus bassist Richard Grossman played bass in Men at Work in the late ’90s; The Bangles appeared on the Hoodoo Gurus album Blow Your Cool with Grossman, as well as on the Tom Petty and the Heartbreakers track “Waiting for Tonight”; furthermore, Prince wrote the Bangles hit “Manic Monday”
38. Steve Hackett: former Genesis guitarist
39. Stevie Nicks: member of Fleetwood Mac
40. Daryl Hall: one half of Hall & Oates
41. Robert Fripp: produced Daryl Hall’s Sacred Songs solo album
42. Cheap Trick: bandleader Rick Nielson appears on Hall & Oates’ Along the Red Ledge (as does Robert Fripp (King Crimson) and Steve Lukather (Toto))
43. David Gilmour: guitarist for Pink Floyd; appeared on albums by Brian Ferry (Roxy Music) and (notably) Kate Bush; worked with Phil Manzanera (Roxy Music)
44. Mental as Anything: Fundamental as Anything producer Richard Gottehrer also produced two Blondie albums; alternatively, Elvis Costello produced the Mentals’ single “I Didn’t Mean to be Mean”; Costello is a frequent collaborator with Paul McCartney, who featured David Gilmour on his track “No More Lonely Nights”
45. The Beatles: George Harrison was in the Traveling Wilburys with Tom Petty
46. Blackfield: a side-project of Porcupine Tree bandleader Steven Wilson
47. Foreigner: founding member Ian McDonald was also a founding member of King Crimson
48. Paul Simon: Simon collaborated with Brian Eno (Roxy Music) on Surprise
49. Robert Palmer: Chris Frantz (Talking Heads) appears on Palmer’s Clues
50. Alice Cooper: producer/collaborator Bob Ezrin has worked with both Peter Gabriel and Pink Floyd

How’s that?