Do I wake my daughter??

Hey ladies I need advice please! My daughter is 16 months old, she has been staying up super late recently. I’ve had her down to one long nap a day then all of a sudden she’s taking a second nap when she should be going to sleep and then she’s up till all hours of the night. I usually let her sleep in till when ever she wakes up, but now she sleeps in later cause she’s falling asleep late. I was thinking I should start waking her up at a normal time? Idk I’m getting desperate! Advice please