[citation needed] She attended Immaculate Heart Academy in Washington Township, Bergen County, New Jersey.

[citation needed] Costanza was introduced to Dan Gow and Will Ferri through a mutual friend in 2011, joining their band.

[6] In May, following the release of their debut album, Costanza performed live with Alex Goot on his tour on several occasions.

[7] Kerrang!, a UK-based magazine devoted to rock music, said that the band were "writing their future", and described Costanza as "Their Fearless Frontwoman".

[14] From July 2020 to May 2021, Costanza was the host of the show Guest House on streaming media channel VENN.

[16] On July 23, 2024, video game publisher Square Enix and Costanza jointly announced her collaboration with composer Masayoshi Soken and his band the Primals for the song "Give It All", which features in the raid series "The Arcadion", part of the video game expansion Final Fantasy XIV: Dawntrail.

[17][18] In September 2024, Costanza and rock band Yellowcard created a pop-punk cover of "A Whole New World", which appeared on Walt Disney Records' A Whole New Sound compilation album.

The album's tracklist contained songs released previously, including her debut single "7 Minutes in Hell" which featured Voilà.

[22] In February 2021, she started dating Tucker Roberts, president of Spectacor Gaming and son of Comcast CEO Brian L.