Question: Eastown Theatre has hosted the Canadian rock band formed in Toronto in 1967 by which lead singer?

Context paragraphs:
Edwin (musician): Edwin (born Edwin Ghazal) is a Canadian alternative rock singer from Toronto.  He is the lead vocalist for successful Canadian rock band I Mother Earth and a solo artist.  He is also the lead singer for the Canadian supergroup Crash Karma.  In 2016, he reunited with I Mother Earth for a series of shows and a tour commemorating the 20th anniversary of their biggest commercial release, Scenery And Fish.

Sean Kelly (Canadian musician): Sean Kelly is a Canadian musician, currently playing guitar in the band with Nelly Furtado.  He founded the Toronto-based glam rock band Crash Kelly, and is the band's lead singer and guitarist.  Kelly was a member of Canadian rock band Helix, playing bass guitar.  He stayed with them for most of 2009 at which time joined Furtado's band on guitar.  He is also guitarist for the Toronto rock group 69 Duster, which he co-founded with the ex-singer for Images in Vogue, Dale Martindale.  He has done session guitar work for other bands as well, including Neil Leyton's 2003 album, Midnight Sun, and was a member of Jeff Pearce's band Rye.  Kelly has also collaborated with Gilby Clarke, Rough Trade, Rudy Sarzo, Coney Hatch, and The Canadian Brass.

Mystery (band): Mystery (often stylized as MYSTERY) is a Canadian rock band formed in 1986 by multi-instrumentalist Michel St-Père.  The band released their eponymous debut EP in 1992 with Raymond and Gary Savoie on lead vocals, followed by their first album "Theatre of the Mind" in 1996 and "Destiny? " in 1998, both with Gary on lead vocals.  In 2007 the band released their third album "Beneath the Veil of Winter's Face" with singer Benoît David who would record two more studio albums with the band: "One Among the Living" in 2010 and "The World is a Game" in 2012.  On November 1, 2015 the band released their sixth album "Delusion Rain" with current singer Jean Pageau.

Canadian music genres: Canadian music genres identifies musical sounds as belonging to a particular category and type of music that can be distinguished from other types of music made by Canadians.  The music of Canada has reflected the multi-cultural influences that have shaped the country.  First Nations people, the French, the British, the Americans and many others nationalities have all made unique contributions to the musical genres of Canada.  During the swing boom of the late 1930s and early 1940s, Canada produced such notable bandleaders as Ellis McLintock, Bert Niosi, Jimmy Davidson, and Mart Kenney.  In the 1940s, Bert Niosi and Oscar Peterson became widely known.  Canada has also produced a number of respected classical music ensembles, including the Montreal Symphony Orchestra and the Toronto Symphony Orchestra.  Canadian rock describes a wide and diverse variety of music produced by Canadians, with the most notable Canadian rock band being Rush, who currently place fifth behind The Beatles, The Rolling Stones, KISS and Aerosmith for the most consecutive gold and platinum albums by a rock band.  The Canadian hip hop scene was first established in the 1980s.  Some of the most well known Canadian rappers and hip-hop artists include Drake and Maestro Fresh-Wes.

Our Lady Peace: Our Lady Peace (sometimes shortened to OLP) is a Canadian rock band formed in Toronto, Ontario, in 1992.  Headed by lead vocalist Raine Maida since its formation, the band additionally consists of Duncan Coutts on bass, Steve Mazur as lead guitarist, and Jason Pierce on drums.  The band has sold millions of albums worldwide, won four Juno Awards, and won ten MuchMusic Video Awards — the most MMVAs ever awarded to any artist or group.  Our Lady Peace are one of Canada's most popular bands and are also one of the few Canadian rock acts that managed to achieve success in both the 1990s and 2000s.

The Sheepdogs: The Sheepdogs are a Canadian rock and roll band formed in Saskatoon, Saskatchewan in 2006.  The group consists of lead singer and guitarist Ewan Currie, bass guitarist Ryan Gullen, drummer Sam Corbett, guitarist Jimmy Bowskill, and Shamus Currie, brother of lead singer Ewan Currie, playing trombone, keyboards, and tambourine.  The Sheepdogs became the first unsigned band to make the cover of "Rolling Stone" in 2011 and have since grown to popularity in Canada and the United States.

Steppenwolf (band): Steppenwolf is a Canadian rock band that was prominent from 1968 to 1972.  The group was formed in late 1967 in Toronto by lead singer John Kay, keyboardist Goldy McJohn, and drummer Jerry Edmonton (all formerly in Jack London & The Sparrows from Oshawa, Ontario).  Guitarist Michael Monarch and bass guitarist Rushton Moreve were recruited by notices placed in Los Angeles-area record and musical instrument stores.

Forty Foot Echo: Forty Foot Echo is a Canadian rock band formed in 2001 by lead singer and songwriter Murray Yates.  The band released their debut album, "Forty Foot Echo" in 2003 on Hollywood Records, where they released two singles, "Save Me" and "Brand New Day", the latter appearing on the certified Gold selling "Freaky Friday" soundtrack as well.  Troubles with the label led them to part ways in 2004, though Yates persevered, assembling a new band and releasing a follow-up album "Aftershock" in 2006.  After a long hiatus, Yates reformed the band again in 2013 to release a third album, "Returning", and has announced plans to release further music in 2015 as well.

Eastown Theatre: Eastown Theatre was a 2,500-seat theater located in Detroit, Michigan.  Opening in 1931, it operated as a movie theater until being converted into a rock venue in 1967.  Performers included Faces, Fleetwood Mac, Steppenwolf, Cream and The Amboy Dukes.

The Hunt (band): The Hunt was a Canadian rock band formed in 1977, mostly made up of members from another Canadian rock band Dillinger.  After Dillinger broke up, guitarists Paul Dickinson and Paul Cockburn, drummer and percussionist Paul Kersey, keyboard player Jacques Harrison, keyboard player and bass guitarist Gerry Mosby, bass guitarist Carl Calvert, and guitarist and bass guitarist Brian Gagnon all eventually were in The Hunt.  Most members also sang.  Producer Steve Vaughan joined the band for two of the albums.  Carl Calvert played bass guitar on the album "Thrill of the Kill" in place of Brian Gagnon.  After having success in Canada but not much in the U.S., the group disbanded in 1984.

Supporting paragraphs: Eastown Theatre Steppenwolf (band)
Answer: John Kay