The Hellenic Broadcasting Corporation (ERT) internally selected Helena Paparizou as its performer for the 50th edition of the Eurovision Song Contest.

ERT then selected four songs –"My Number One", "OK", "Let's Get Wild", and "The Light in Our Soul"– to be performed by her in a televised national final aired on 2 March 2005.

Shortly before the national final, it was revealed that "The Light in Our Soul" had been already released by Big Alice, thus it was disqualified, leaving out only three songs.

"My Number One" gained a combined 66.47% from televoting and jury votes winning the competition and becoming the Greek entry for Eurovision.

On 21 May 2005, the final for the Eurovision Song Contest was held at the Palace of Sports in Kyiv hosted by the National Television Company of Ukraine (NTU), and broadcast live throughout the continent.

Paparizou performed "My Number One" nineteenth on the evening, following Croatia's "Vukovi umiru sami" by Boris Novković and LADO and preceding Russia's "Nobody Hurt No One" by Natalia Podolskaya.

When Paparizou arrived back to Greece from Kyiv, mass crowds met her at the Athens International Airport, where she held up a Greek flag and the trophy.

The semi-final held on 18 May 2006, opened with a medley of former Eurovision songs performed by different Greek gods, with all the cast finishing with "My Number One".

[12] On 22 May 2021, the interval act "Rock the Roof" in the Eurovision Song Contest 2021 final featured a revamped version of "My Number One" performed by Paparizou.

In September 2006, the Georgie’s #1 Radio Anthem Mix was added to popular American retailer Abercrombie & Fitch's store playlist nationwide.