Question: Are Joan Jett and Gene Simmons both singers?

Context paragraphs:
Blackheart Records: Blackheart Records is an American record label founded by rock musicians Joan Jett and Kenny Laguna.  Artists include The Eyeliners, Girl in a Coma, the Cute Lepers, the Dollyrots, The Vacancies, and Joan Jett & the Blackhearts.

Joan Jett: Joan Marie Larkin (born September 22, 1958), known professionally as Joan Jett, is an American rock singer, songwriter, composer, musician, record producer and occasional actress.

Radioactive (Gene Simmons song): "Radioactive" is the only single released from the Kiss solo album "Gene Simmons".  The song is written by Gene Simmons and produced by Simmons and Sean Delaney.  Released in 1979, the song was recorded in the spring of 1978.  "Radioactive" reached #47 on the "Billboard" charts during an 8-week run between April and May 1979.  When the single was released, a limited-edition red vinyl 45 rpm album was made available.

Bad Reputation (Joan Jett album): Bad Reputation is the debut solo studio album by American recording artist Joan Jett, originally self-released in 1980 as Joan Jett after her previous band The Runaways disbanded, then re-issued on Boardwalk Records in 1981 as "Bad Reputation".

Nick Simmons: Nicholas Adam Tweed-Simmons is a reality television personality, and the son of musician Gene Simmons.  He is best known for starring in the A&E network "Gene Simmons Family Jewels".

Gene Simmons Family Jewels: Gene Simmons Family Jewels is an American reality television series that premiered on A&E on August 7, 2006.  The show follows the life of Kiss bassist and vocalist Gene Simmons, his longtime partner and wife Shannon Tweed, and their two children, Nick and Sophie.  Although it is presented as a reality series, it has been noted that some events shown on the show did not actually occur.  One of these events was depicted in the finale of Season 3, where the viewer is led to believe that Gene purchased the Australian Football team Carlton Football Club, while in reality there is no record of the team being sold to him.  In addition to this, the episode shows Gene convincing Brendan Fevola to join Carlton Football Club, while in reality Fevola had been playing for Carlton since he was drafted in 1998.  Other events include casting biker extras, as well as a bit actor in the show.

Rock School: Rock School (also known as Gene Simmons' Rock School) was a British reality television series starring Gene Simmons from the rock band Kiss, in which he had a short time to turn a class of school children into a fully fledged rock band, at the end of which they must perform in a supporting slot for a leading rock band.

Gene Simmons: Gene Klein, born Chaim Witz (Hebrew: חיים ויץ‎ ‎ , ] , born August 25, 1949), known professionally as Gene Simmons, is an Israeli-American musician, singer, songwriter, record producer, entrepreneur, actor and television personality.  Also known by his stage persona The Demon, he is the bass guitarist and co-lead singer of Kiss, the rock band he co-founded with rhythm guitarist Paul Stanley in the early 1970s.

Up Your Alley (album): Up Your Alley is the sixth studio album by the American rock band Joan Jett and the Blackhearts.  It was originally released in May 1988, on the labels Blackheart and CBS-Sony in the U.S., and Polydor in (Europe and Japan), a year and a half after their previous album "Good Music".  This album contains the single "I Hate Myself for Loving You", which peaked at No. 8 on the "Billboard" Hot 100, and had been used as the theme song for "Sunday Night Football" NFL games in America (with altered lyrics, by two singers) during the 2006 and 2007 seasons.  The follow-up single "Little Liar" continued Jett's chart success, peaking at No. 19 on the Hot 100 in late 1988/early 1989.

Unholy (song): "Unholy" is a song by the American hard rock band Kiss, written by Gene Simmons and Vinnie Vincent.  Featured on their 1992 album "Revenge", the song is one of the three Vincent co-writes to appear on the album despite the fact that he had been fired from the band 8 years earlier.  The release of "Unholy" signaled the return to a heavier sound for Kiss and was their first single to feature a lead vocal by bassist Gene Simmons since "I Love It Loud" in 1982 (a song also co-written by Vincent).  The song was played live during the "Revenge" Tour and was included on the 1993 live album "Alive III", but did not return to the live Kiss set list until 2004's Rock the Nation Tour.

Supporting paragraphs: Joan Jett Gene Simmons
Answer: yes