Fans noticed the break up when they both unfollowed each other off Instagram - which we all know is the modern way a break up works.
Even further, Madison deleted all traces of Zack from her Instagram. While Zack still has some traces of Madison on his, we can only bet that they will start to disappear soon.
However, it doesn't look like Madison is at home crying about it.
In fact, it looks like she may have already moved on with somebody new. Madison was spotted looking extremely happy with a mystery man at Urth Caffe in Hollywood just recently, which you can see right here.
Friend or lover, it doesn't look like the break up was too hard on Madison.