First we three kings parody:
We three kings of Leicester square
Selling ladies underwear
So fantastic, no elastic
Only £2 a pair

O pants for children pants for mum
Pants for doing a hard math sum
Downward leading their still proceeding
Guide us to thy perfect bum

Second one:

We four Beatles of Liverpool are,
Paul by taxi john by car
Charlie by scooter blowing his hooter
Following ringo star