I want to sing a song for my best friend of the opposite sex on his birthday. What song should I give him?

Hello!

Don't deliberately sing "Happy Breakup" and "Eternal Life" on your birthday. What you sing is not particularly important. Just sing one of your favorite songs. Of course, as long as it’s a song that doesn’t ruin the atmosphere

This is just my personal opinion, don’t comment if you don’t like it, thank you.