I've lived in my apartment for a month now and about two weeks ago we had a birthday party. There was music playing, but for the most part it was not too rowdy. The next day we cleaned up the porch, all the cigarette butts and stuff. None of the neighbors complained so we thought it was fine. Well today I come home to an eviction notice. So I went next door to talk to my landlord, and she said we destroyed flowers and "smeared pizza on her door." We never even had pizza!! I explained to her that we're definitely not partiers and did apologize if it was too loud. I promised her that it was the first and last party we would ever have but she was still angry and told us to look for a new place. We've paid all our rent and utilities on time and she said there's never been any problems besides this one party. We are the youngest tenants in all the units (in our early 20s) and she says we're not mature enough to live here. I feel like she's discriminating because we're young.

Any advice or help please!? I live in Michigan.
Additional Details
We signed a one year lease. And also- I didn't know that having friends over made you "immature." Haha, I think she's being more immature than us by not even talking to us and just slamming us with an eviction notice.