This is the 3381st most frequent Russian word.
популярным
"Popular."
Here, "популярным" functions as an adjective, describing the state of being well-liked or widely known.
Этот фильм стал очень популярным в нашей стране.
This movie became very popular in our country.
In this sentence, "популярным" modifies "певцом," signifying the individual's fame and recognition in their professional domain.
Его всегда считали популярным певцом.
He was always considered a popular singer.
Here, "популярным" attributes a widely chosen or accepted quality to "выбором."