Quiz night #3

Hey guys!
It's quiz night again and here Is the sheet:

if 7 = DOTW means 7 = Days of the week - what do these mean?

1. 2 = H are BTO
2. 650 = S in the HOC
3. 21 = KOTD
4. 21 = S on a D
5. 36 = I in a Y

Can you tell who is singing (All are two words)?
1. MNLNcOEAD
2. NBVEUNJYI

cheers for all help

1. two heads are better then one
2. 650 = seats in the house of commons
3. 21 = key of the door
4, 21 = spots on a die
5. 36 inches in a yard

Jive Bunny for the second one.. I think.

Don McLean. :p