Los Angeles, April 20 -- Even the world's biggest stars have someone they once idolised from afar. For Billie Eilish, that person was Justin Bieber, and over the weekend, a childhood dream came full circle in the sweetest way possible.

During a recent concert, Bieber invited Billie on stage and serenaded her with his 2009 fan-favourite song 'One Less Lonely Girl.'

The adorable moment went viral on the internet in no time, especially for fans who know just how deeply Billie admired Bieber growing up.

Soon after, Billie's mother, Maggie Baird, shared a heartfelt post on Instagram to reflect on what it meant to watch her daughter experience a dream she once thought impossible.

Speaking about the "deep connections" kids often form with ar...