Basically children's songs, such as:
Marry had a little lamb
Twinkle twinkle little star
My Bonie is over the ocean (I don't know if this the tittle)
Raw raw your boat, and many more...
And for the adult's songs since my parents love to karaoke :
Mr. Postman - Carpenter
Hey Jude - The Beetles
Rain and Tears
Welcome to the hotel the California
Several songs by Louis Armstrong
Several Spice Girls' songs, and many more..