Sheryl Suzanne Crow (born February 11, 1962) is an American musician, singer, songwriter and actress. Her music incorporates elements of pop, rock, country and blues. She has released ten studio albums, four compilations, a live album, and has contributed to a number of film soundtracks. Her songs include "All I Wanna Do" and "If It Makes You Happy."

In 2011, Crow separated from her label, A&M Records. The singer followed Nashville neighbor Brad Paisley's advice and, after being introduced to producer Justin Niebank and several Nashville-based songwriters such as Chris DuBois, Luke Laird and Chris Stapleton, started her first country music project. In 2013, Crow signed a recording contract with Warner Music Nashville and, a few months later, released "Easy," the first single from the upcoming album, which became her first top twenty country radio hit and her highest charting lead single since 2005. Feels Like Home was released on September 10, 2013, and debuted at number seven on the Billboard 200 with first-week sales of over 36,000 copies, becoming Crow's ninth top ten album. Crow was one of the opening acts for George Strait's 2014 leg of The Cowboy Rides Away Tour. Along with Stevie Nicks, Bonnie Raitt, Emmylou Harris and Carrie Underwood, she made an appearance at the Rock and Roll Hall of Fame induction ceremony, paying tribute to Linda Ronstadt, who was one of the inductees of 2014. Crow, along with country band Gloriana, joined Rascal Flatts on their Rewind Tour, which kicked off May 16, 2014. The 40th anniversary celebration benefit concert of the Austin City Limits Festival was held June 26, 2014. Crow hosted the event along with Jeff Bridges and performed with Kris Kristofferson, Gary Clark Jr, Alabama Shakes, as well her former guitarist Doyle Bramhall II. Crow sang on a rendition of "Baby, It's Cold Outside" that appeared on Darius Rucker's Christmas album, Home for the Holidays. In December 2015, she covered "A Hard Day's Night" at the John Lennon 75th Birthday Concert, and performed "Two More Bottles of Wine" with Vince Gill at another tribute concert: The Life & Songs of Emmylou Harris.

Answer the following question by taking a quote from the article: What did she do in 2015?
In December 2015, she covered "A Hard Day's Night" at the John Lennon 75th Birthday Concert,