MuzicaHot is a popular portal for Romanian music downloads. If you are looking for the MP3 on their site, follow these general steps:
Look for the version you want (e.g., Original Radio Edit or a Remix).
Denisa Grecu has built a significant following on platforms like YouTube and Spotify, where "Mai Stai" and its remixes often garner hundreds of thousands of views. Downloading from MuzicaHot
Watch the official music video on the Denisa Grecu Official YouTube Channel.