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\n\tYou may recognize Julia Michaels<\/a>\u00a0from her 2017 breakout single \u201cIssues,\u201d which peaked at No. 11 on the Billboard\u00a0Hot 100<\/a>,\u00a0or her 2020 smash with JP Saxe \u201cIf The World Was Ending.\u201d But chances are, you\u2019ve actually been listening to the Iowa-born singer\u2019s catchy, emotive, often tongue-in-cheek lyricism for much longer than you think.<\/p>\n \n\tThat\u2019s because Michaels first started out in the industry as a songwriter, sans the \u201csinger-,\u201d penning hits for the likes of Fifth Harmony<\/a>, Justin Bieber<\/a> and Selena Gomez<\/a>. Her co-writing catalog spans a range of diverse artists and genres, from pop radio material to rugged acoustic sounds and rock, and several of her creations for other performers have climbed the Billboard <\/em>charts over the years.<\/p>\n \n\tWith that in mind, Michaels already had a proven hitmaker on her songwriting team when setting out to make her debut in 2017: herself. By using her pen for her own songs, the musician has been able to score multiple entries on the Billboard 200<\/a> \u2014 including her debut EP Nervous System <\/em>and first LP Not in Chronological Order <\/em>\u2014 as well as a few solo singles on the Pop Airplay, Adult Contemporary and Adult Pop Airplay charts.<\/p>\n \n\tThrough her solo efforts, however, Michaels hasn\u2019t stopped writing for other artists. And even though she\u2019s one of the most in-demand songwriters out there, the nature of her job means she shines the most behind the scenes \u2014 which is why there\u2019s probably a number of tracks you\u2019ve heard but had no idea she worked on. <\/p>\n \n\tBelow, see 20 of such songs, from Sabrina Carpenter to Britney Spears and Nick Jonas.<\/p>\n