[3] Anatoly Rosinsky, Bruce Dukov, Helen Nightengale, Josefina Vergara, Julie Gigante, Liane Mautner, Natalie Leggett, Becky Bunnell, Roberto Cani, Sarah Thornblade, Shoshana Claman, Sid Page, Tiffany Hu, Katia Popov, Michele Richards, Phillip Levy, Songa Lee and Tammy Hatwan performed the strings for "Finally".

[5] The song is set in common time composed in a moderate tempo of 84 beats per minute,[6] with a main key of C major with a vocal range from the tone of G3 to the note of E5.

[9] He concluded by stating that while the song "may be at odds with her bangin' club persona", it is a "rich, introspective number" that showcases Fergie's "maturity and sincerity rather nicely".

[9] According to a reviewer from Alloy, Fergie shines "without a trace" of hip hop, reggae, or rap, which proves that she does not need sexual lyrics or synth-produced dance beats to "show off her pipes".

"[5] While giving a negative review of The Dutchess, Mike Joseph of PopMatters wrote that Fergie "shows hints of promise" in "Finally".

[11][12][13] Fergie performed the track multiple times on television, most notably on 2008's Dick Clark's New Year's Rockin' Eve and The Tyra Banks Show.