Connie Francis, the pop vocalist whodied this week,was seeing a resurgence in popularity long after her '50s and '60s fame — thanks to TikTok. Francis died Wednesday, July 16 at 87 after recently being hospitalized in an intensive care unit, where she was undergoing tests to find the source of her "extreme pain," according to her Facebook. She was best known for her love songs, including "Stupid Cupid," "Who's Sorry Now" and "Where The Boys Are." But younger generations may recognize her peppy voice from 1962 track "Pretty Little Baby," which has become popular among TikTokers as a backdrop foradorable animals,makeup tutorialsand a slew ofother videos. Here's what to know about the song and its modern-day resurgence. Connie Francis'Pretty Little Baby' and 'Who's Sorry Now' pop singer dies at 87 "Pretty Little Baby" gained momentum on TikTok in May, with celebrities and influencer alike sharing videos to the song.North WestandKylie Jennerlip synced to the song and creators likeAbbie HerbertandBrooke Monkalso used the audio. To date, the song has been used on more thanone million TikTok videos. At its peak, "Pretty Little Baby" averaged over 600,000 daily creates on TikTok and hit No. 1 on both the app's Viral 50 and Top 50 charts, according to apress release. "The huge viral success of 'Pretty Little Baby' is the perfect example of the power of music discovery on TikTok," Tracy Gardner, TikTok's global head of music business development, said in the release. The song's popularity even got Francis herself tojoin TikTokin June. "I'm flabbergasted and excited about the huge buzz my 1962 recording of 'Pretty Little Baby' is making all over the world," she said in a video on the page. "To think that a song I recorded 63 years ago is captivating new generations of audiences is truly overwhelming for me." On Francis' TikTok page, comments were flooded with messages of condolences after her death, with many users expressing appreciation for the resurgence of "Pretty Little Baby." "She died happy knowing that this generation likes her music," one personwrote. "You will be missed. Thank you for the music." Anotherwrote, "RIP Connie Francis. She died knowing her song became famous again." "Pretty Little Baby" was released in 1962 as part of Connie Francis' album "Connie Francis Sings Second Hand Love & Other Hits." The song was not released as a single. Francistold Billboardin May that she didn't remember recording the song until she listened to it. "It's just a blessing to know that kindergarten kids know me and my music now. It's really thrilling," she told the outlet. The track was one of 40 songs Francis recorded over four days in August 1961, according to Billboard. Melina Khan is a national trending reporter for USA TODAY. She can be reached atmelina.khan@usatoday.com. This article originally appeared on USA TODAY:Connie Francis' song 'Pretty Little Baby' went viral before her death