Hillari Kimble has asked Stargirl not to sing to her on her birthday the next day, because Stargirl sings to everyone on their birthdays.
When the cafeteria lady calls for the trays, multiple students tell her to shut up because they want to hear if Stargirl will or won't sing to Hillari.
Panel 3:The next day on Hillari's birthday, Stargirl sings "Happy Birthday", not to Hillari, but to Leo singing "Happy Birthday dear Hillari Kimble."
Don't you dare sing to me tomorrow.
Okay, I won't.
THE NEXT DAY...
Happy birthday to you. Happy birthday to you. Happy birthday dear Hillari Kimble! Happy birhday to you!