Question: Nick Carter and Alvin Lee are both what?

Context paragraphs:
Dead 7: Dead 7 (formerly titled Dead West) is an American post-apocalyptic zombie horror western film written by Nick Carter, American singer best known as a member of the Backstreet Boys.  It is directed by Danny Roew and produced by The Asylum.  The movie aired on SyFy on April 1, 2016 in the United States.  Carter managed to get two of his bandmates, A. J. McLean and Howie Dorough to star in the movie.  In addition, Carter also cast several members from other boy bands like 98 Degrees, O-Town, 'N Sync and All-4-One.  A free copy of the theme song "In the End" was released on March 28, performed by band members Nick Carter, AJ McLean and Howie D.; Joey Fatone and Chris Kirkpatrick from NSYNC; Jeff Timmons from 98 Degrees; and Erik-Michael Estrada from O-Town.

In Tennessee: Alvin Lee In Tennessee is a studio album by Alvin Lee released in 2004.

Nick Carter, Master Detective: Nick Carter, Master Detective was a Mutual radio crime drama based on tales of the fictional private detective Nick Carter from Street & Smith's dime novels and pulp magazines.  Nick Carter first came to radio as The Return of Nick Carter, a reference to the character's pulp origins, but the title was soon changed to Nick Carter, Master Detective.  A veteran radio dramatist, Ferrin Fraser, wrote many of the scripts.

Raffles (Lord Lister): Raffles (also known as Lord Lister) is a fictional character who first appeared in a German pulp magazine entitled "Lord Lister, genannt Raffles, der Meisterdieb" published in 1908, written by Kurt Matull and Theo Blakensee.  The series was continued after a few issues as "Lord Lister, genannt Raffles, der große Unbekannte" ("...Known as Raffles, the Great Unknown"), which was the title of the first novel.  The series became very popular and was translated, as well as continued in a number of countries and achieved such a popularity that Raffles was used in an Italian series as an opponent for Nick Carter, as Carter's European equivalent, a context in which he has been described as Europe's greatest pulp hero.  Unlike Nick Carter, Lord Lister was never thoroughly updated.  The Dutch series was the last surviving one, ending in 1968.  The first English translation of The Great Unknown was published in February 2015.

Alvin Lee: Alvin Lee (born Graham Anthony Barnes; 19 December 1944 – 6 March 2013) was an English singer and guitarist, best known as the lead vocalist and lead guitarist of the blues rock band Ten Years After.

Nick Carter and Red Club: Nick Carter and Red Club (French: "Nick Carter et le trèfle rouge" ) is a 1965 French action film directed by .  The film features the successful literary character Nick Carter and is based on a novel by Claude Rank.  The film is a sequel to "Nick Carter va tout casser" (1964).

Chick Carter, Detective: Chick Carter, Detective is a 1946 Columbia film serial.  Columbia could not afford the rights to produce a Nick Carter serial so they made "Chick Carter, Detective" about his son instead.  This was based on the radio series "Chick Carter, Boy Detective".  A Nick Carter series was being made by MGM.

Nick Carter va tout casser: Nick Carter va tout casser is a French action film starring Eddie Constantine as Nick Carter.  An English version was dubbed by Eddie Constantine dubbing himself.  Constantine repeated his role in "Nick Carter et le trèfle rouge" (1965).  The film was titled License to Kill in the USA.

I Heart Nick Carter: I Heart Nick Carter is an American reality television series starring Nick Carter.  The series premiered on September 10, 2014, on VH1.

Nick Carter (musician): Nickolas Gene "Nick" Carter (born January 28, 1980) is an American singer, songwriter, actor, and dancer.  He is best known as a member of the pop group the Backstreet Boys.  As of 2015, Carter has released three solo albums, "Now or Never", "I'm Taking Off" and "All American" during breaks between Backstreet Boys schedules, and a collaboration with Jordan Knight titled "Nick & Knight".  He has made occasional television appearances and starred in his own reality shows, "House of Carters" and "I (Heart) Nick Carter".  He gained fame in the mid 1990s and early 2000s as a teen idol.  He is also the older brother of singer Aaron Carter and the late Leslie Carter.

Supporting paragraphs: Nick Carter (musician) Alvin Lee
Answer: singer