Background: Taylor Alison Swift (born December 13, 1989) is an American singer-songwriter. One of the leading contemporary recording artists, she is known for narrative songs about her personal life, which have received widespread media coverage. Born and raised in Pennsylvania, Swift moved to Nashville, Tennessee at the age of 14 to pursue a career in country music. She signed with the label Big Machine Records and became the youngest artist ever signed by the Sony/ATV Music publishing house.
Context: One of Swift's earliest musical memories is listening to her maternal grandmother, Marjorie Finlay, sing in church. As a child, she enjoyed Disney film soundtracks: "My parents noticed that, once I had run out of words, I would just make up my own". Swift has said she owes her confidence to her mother, who helped her prepare for class presentations as a child. She also attributes her "fascination with writing and storytelling" to her mother. Swift was drawn to the storytelling of country music, and was introduced to the genre by "the great female country artists of the '90s"--Shania Twain, Faith Hill and the Dixie Chicks. Twain, both as a songwriter and performer, was her biggest musical influence. Hill was Swift's childhood role model: "Everything she said, did, wore, I tried to copy it". She admired the Dixie Chicks' defiant attitude and their ability to play their own instruments. The band's "Cowboy Take Me Away" was the first song Swift learned to play on the guitar. Swift also explored the music of older country stars, including Patsy Cline, Loretta Lynn, Dolly Parton and Tammy Wynette. She believes Parton is "an amazing example to every female songwriter out there". Alt-country artists such as Ryan Adams, Patty Griffin and Lori McKenna have inspired Swift.  Swift lists Paul McCartney, The Rolling Stones, Bruce Springsteen, Emmylou Harris, Kris Kristofferson, and Carly Simon as her career role models: "They've taken chances, but they've also been the same artist for their entire careers". McCartney, both as a Beatle and a solo artist, makes Swift feel "as if I've been let into his heart and his mind ... Any musician could only dream of a legacy like that". She admires Springsteen for being "so musically relevant after such a long period of time". She aspires to be like Harris as she grows older: "It's not about fame for her, it's about music". "[Kristofferson] shines in songwriting ... He's just one of those people who has been in this business for years but you can tell it hasn't chewed him up and spat him out", Swift says. She admires Simon's "songwriting and honesty ... She's known as an emotional person but a strong person".  Swift has also been influenced by many artists outside the country genre. As a pre-teen, she enjoyed bubblegum pop acts including Hanson and Britney Spears; Swift has said she has "unwavering devotion" for Spears. In her high school years, Swift listened to rock bands such as Dashboard Confessional, Fall Out Boy, and Jimmy Eat World. She has also spoken fondly of singers and songwriters like Michelle Branch, Alanis Morissette, Ashlee Simpson, Fefe Dobson and Justin Timberlake; and the 1960s acts The Shirelles, Doris Troy, and The Beach Boys. Swift's fifth album, the pop-focused 1989, was influenced by some of her favorite 1980s pop acts, including Annie Lennox, Phil Collins and "Like a Prayer-era Madonna".
Question: What did she enjoy about them?

Answer:
Swift has said she has "unwavering devotion" for Spears.