Punk Rockers to Change Lightbulb

Q: How many punk rockers does it take to change a light bulb?
A: Two: One to screw in the bulb and the other to smash the old one on his forehead.

Light Bulbs to Change Light Bulbs

Q: How many light bulbs does it take to change a light bulb?
A: Two, the new one and the old one

Light Bulb - Musician

Q: Do you know how many musicians it takes to change a light bulb?
A: Twenty. One to hold the bulb, two to turn the ladder, and seventeen in on the guest list.