Álvarez achieved much popularity in her native country, due to her long career on television, which included a successful eight-year run with her award-winning show Esta Noche Mariasela.
Álvarez memperoleh banyak popularitas di negara asalnya, karena kariernya yang panjang di televisi, termasuk diantaranya sukses menjalankan acaranya Esta Noche Mariasela selama delapan tahun dan memperoleh banyak penghargaan.