In 1989, Mario Olguín created the musical group Beatlemania, which has already had 36 years of uninterrupted national and international career.

Alongside this musical activity, in 1997 he organized the first Beatles Tour to England, taking Beatles fans to London and Liverpool.
To date, he has already made 25 trips and taken over 400 people from different countries in America and Europe to England.

Starting in 2020, he began recording and publishing his own songs on YouTube, with no other aim than to indulge himself.

Without leaving Beatlemania, at the end of 2021 he created Los Bestones, a band formed mostly by members of the Beatlemania Group and who participate in the arrangements of his songs and in their live performance.

Her first official single was "London City" , uploaded to digital platforms on August 2, 2024, in March 2025 she released the second, "Gimme Gimme Love" .

The third one, "Sultan", was published in July 2025.