In 1989,Mario Olguin created the musical group Beatlemania, which already has 35 years of uninterrupted national and international experience.

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Parallel to this musical activity, in 1997 he carried out the first Beatles Tour to England carrying followers of The Beatles to London and Liverpool.
To date he has already made 23 trips and taken over 300 people from different countries in America and Europe to England.

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Since 2020, he began recording and publishing songs of his own on YouTube, with no other intentions 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 which participates in the arrangements of his songs and in their live performance.

His first official single is "London City", uploaded to digital platforms on August 2, 2024.