Eilleen Regina "Shania" Twain ( eye-LEEN ... shə-NY-ə; née Edwards; born August 28, 1965) is a Canadian singer-songwriter and actress. She has sold over 100 million records, making her the best-selling female artist in country music history and one of the best-selling music artists of all time. Her success garnered her several titles including the "Queen of Country Pop". Billboard named her as the leader of the '90s country-pop crossover stars.

Raised in Timmins, Ontario, Twain pursued singing and songwriting from a young age before signing with Mercury Nashville Records in the early 1990s. Her self-titled debut studio album was a commercial failure upon release in 1993. After collaborating with producer and later husband Robert John "Mutt" Lange, Twain rose to fame with her second studio album, The Woman in Me (1995), which brought her widespread success. It sold over 20 million copies worldwide, spawned eight singles, including "Any Man of Mine" and earned her a Grammy Award. Her third studio album, Come On Over (1997), became the best-selling studio album by a female act in any genre and the best-selling country album of all time, selling over 40 million copies worldwide. Come On Over produced twelve singles, including "You're Still the One", "From This Moment On", "That Don't Impress Me Much" and "Man! I Feel Like a Woman!" and earned Twain four Grammy Awards. Her fourth studio album, Up! (2002), spawned eight singles, including "I'm Gonna Getcha Good!", "Ka-Ching!" and "Forever and for Always", selling over 20 million copies worldwide, also being certified Diamond in the United States.

In 2004, after releasing her Greatest Hits album, which produced three new singles including "Party for Two", Twain entered a hiatus, revealing years later that diagnoses with Lyme disease and dysphonia led to a severely weakened singing voice. She chronicled her vocal rehabilitation on the OWN miniseries Why Not? with Shania Twain, released her first single in six years in 2011, "Today Is Your Day", and published an autobiography, From This Moment On. Twain returned to performing the following year with an exclusive concert residency at The Colosseum at Caesars Palace, Shania: Still the One, which ran until 2014. In 2015, she launched the North American Rock This Country Tour, which was billed as her farewell tour. Twain released her first studio album in 15 years in 2017, Now, and embarked on the Now Tour in 2018. In 2019, she started her second Las Vegas residency, Let's Go! at the Zappos Theater. Her sixth studio album Queen of Me was released in 2023.

Twain has received five Grammy Awards, two World Music Awards, 39 BMI Songwriter Awards, stars on Canada's Walk of Fame and the Hollywood Walk of Fame, and inductions into the Canadian Music Hall of Fame and Nashville Songwriters Hall of Fame. According to the RIAA she is the only female artist in history to have three (consecutive) albums certified Diamond by the RIAA and is the sixth best-selling female artist in the United States. Altogether, Twain is ranked as the 10th best-selling artist of the Nielsen SoundScan era. Billboard listed Twain as the 13th Greatest Music Video Female Solo Artist of all time (42nd overall).