Hyorin of Sistar, Jooyoung, and Bumkey have come together under Starship Entertainment to release a new Rn B single called “Loveline”.
In 2012, Hyolyn starred in the KBS drama Dream High Season 2 as Nana, a famous idol from the fictional girl group Hersh E.
Hyolyn was teamed up with Ailee and T-ara's Jiyeon for the song "Superstar" for this drama.
On November 22, 2013, Hyolyn shared the stage with Stevie Wonder for a special performance of "I Just Called to Say I Love You" at the 2013 Mnet Asian Music Awards, South Korea's biggest music award show.
Hyolyn made her solo debut on November 26, with the album Love & Hate.
The album consists of double title tracks "Lonely" and "One Way Love" with tracks from producers such as Brave Brothers and Kim Dohoon.
On December 31, Hyolyn's music video for the Korean version of "Let It Go" for Disney's animation movie Frozen was revealed and she became the second Korean singer to participate in a Disney production following Lena Park who previously sang for Disney's "Reflection" for Mulan.The music video for "Without You" was released on April 3.Hyolyn also participated in rapper MC Mong in his comeback to the Korean scene after 5 years with the album Miss Me or Diss Me that was released on November 3.Hyolyn was the first idol group singer to participate in the Chuseok special of the singing show I Am a Singer that aired on September 9.The special episode had performances by veteran singers such as The One, Sinawe, Park Ki Young, Kim Jong Seo and Yoon Min Soo.Hyolyn gave two performances and was ranked second place overall in the competition.