I wished a girl birthday by sending a song she replied thankyou thankyou what does it mean is it normal?

[Anonymous]

[jeffend888]

It means that you are the 75th guy that gave her some kind of birthday wishes and she's quickly reply to all of them. Trust me, you're not unique.

[Anonymous]

It's just normal thank you..
You are overthinking lol

[HelpfulWoman]

that she said thank you.

[pink_blah]

It means thank you

[Asker]

I thought she might be using sarcasm 🙂