Izuocha

Ochako does

Todomomo

Momo does, but Shoto tries sometimes.

Momo just walks in and he's singing Disney Princess songs perfectly

Kirimina

Kiri tries but they don't like it. So Mina takes over but the only songs she knows are songs the kids probably shouldn't hear yet or twinkle twinkle little star

Kamijiro

They both do and the kids love it

Tokotsu

Neither of them really like singing so Dark Shadow does it

Ryushot

Ryuko does

Miruhawks

Hawks gets the guitar and sings to them and the just as they drifting off to the lullabies he switches and starts singing as loud as he can

Erikota

Eri does it and later convinces Kota to join in

Hirorei

Neither of them sing

(Extra)

Kiribaku 

Bakugo banned Kiri from doing it and sings to them himself and he is surprisingly good at iy