There are three (and quite possibly more) acts by the name Julia,

1) Julia was an american emo/hardcore band, active in the mid 1990's.
Their style resembled the frantic sound of eastcoast (more specifically DC) emo, complete with octave chords and dark, yet melodic, basslines, thundering and slow drumming and intensly emotional vocals. On many occasions it sounded like Mathew was about to break down. Some members were playing on Lumber.

Members:
Mathew Yeager (Vocals)
Jeremy Miller (Guitar)
Chad Haley (Bass)
Noah Wilson (Drums)
Steve Miller (Guitar) (also in Unbroken, left the band in 1994. He appeared on the first two records, the first comp song and on the B side of Kathy)

2) Julia, born Julia Fiquet September 24, 2001 in Haute-Savoie, Auvergne-Rhône-Alpes, France, is a French pop singer working with Laurent Boutonnat and Mylène Farmer since 2018. Her first album Passe... comme tu sais was released on June 19, 2020.

3) A band from Austria
Working consistently on their music since the band formed in 2000, Julia have over 331 shows under their belt in over 10 different countries, 2 EP´s and three full length albums on release, not to mention the very dedicated fan base. Upon the arrival of their debut album „Songs About Decay“ Julia signed to monkey.music and were quickly snatched up by management Rodeostar in Hamburg to begin a 30 city/festival tour across Europe with 4lyn.
When their second single „Beautiful“ was released it was chosen as the anthem for the 2005 Ice Hockey World Championship. Julia performed at the opening ceremony in Vienna City Hall in front of thousands of spectators. This event was also shown live on TV throughout 160 countries.

4) Julia van Bergen
Julia van Bergen (born 17 September 1999 in Zeewolde), also known as simply Julia, is a Dutch teen singer who will represent The Netherlands in the Junior Eurovision Song Contest 2014 in Malta with the song "Around". Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.