Choose 24 songs that the children are familiar with and draw a bingo card on the chalk board something like this:

S        I       N      G      O
1        5        8      24     2
3       18      23      16    4
9       13    Free     6    10    
20      7      11      22     12
19      21     15     14     17

Assign a song for each number (don't put this on the board, it's just a master list that you and the pianist need). Make 24 slips of paper numbered 1-24 and put them in a basket/bag/hat etc. Have a child come up and pull out a number. They erase that number from the board and then sing the corresponding song. The object is for them to make a SINGO (BINGO).