Here are some songs you could have a go at singing:

Don't worry be Happy by Bobby McFerrin https://youtu.be/2PlgN0ta6E8

Reach by S Club Seven: https://youtu.be/D6raJluIg40

From Now On from The Greatest Showman - https://www.youtube.com/watch?v=3da_fSXioss&feature=youtu.be 

See you again by Wiz Khalifa and Charlie Puth - https://youtu.be/eH_HHS1LuUs

Can't stop the feeling by Justin Timberlake - https://youtu.be/CqKD2f_uy4E

Love train by The O'Jay's - https://youtu.be/dTHGu-LIAhw

Roar by Katy Perry - https://youtu.be/UW5SMrURVbM

Someone you loved by Lewis Capaldi - https://www.youtube.com/watch?v=iM8EbCubuMg 

Hello by Adele - https://youtu.be/4-jBiumYmXk

Happy by Pharrell Willaims - https://youtu.be/H0m3Lfkzcw4

Shotgun by George Ezra - https://youtu.be/v_B3qkp4nO4