I woke up this morning to find my young music star tamagotchi to be all empty on happiness and food. So I quickly fed her, but for some reason her hunger level won't go above two hearts! Is it a glitch or is something wrong?

Once the tamagotchi becomes a teen, the baby food will only fill it up to two hearts. You'll have to purchase food from the shop.

aw snap, thanks for letting me know, then!