Question: Spider One and Aleksi Sihvonen, have which similar occupation?

Context paragraphs:
Powerman 5000: Powerman 5000 (sometimes abbreviated to PM5K) is an American rock band formed in 1991.  The group has released eight albums, gaining its highest level of commercial success with 1999's "Tonight the Stars Revolt! ", which reached number 29 on the "Billboard" 200 while spawning the singles "When Worlds Collide" and "Nobody's Real".  The band's latest release, "Builders of the Future", came out in 2014 on T-Boy Records, and the group has been on tour in support of the album.  Frontman Spider One is the younger brother of fellow metal musician Rob Zombie.

Charlee Johnson: Charlee Johnson (also Charlee Johnsson) is an American drummer, guitarist and songwriter, originally from San Bernardino, California.  Johnson was a founding member and chief songwriter of Utah punk band Deviance / 3½ Girls.  The band relocated to Boston, Massachusetts and signed with Curve of the Earth Records for their sole EP, "Rule".  Johnson then left to form Halfcocked (then known as Half Cocked) with guitarist Tommy O'Neil, bassist/backing vocalist Jhen Kobran and lead vocalist Sarah Reitkopp, later adding guitarist Johnny Rock Heatley who guested on debut album Sell Out (Halfcocked album) and joined as a full member with second album .  Halfcocked relocated to Los Angeles and signed with DreamWorks in early 2000 by Powerman 5000 frontman Spider One, released final album The Last Star in 2001 (produced by Ulrich Wild), then folded after a brief tour.  Johnsson went on to join childhood hero Danzig for a brief stint as "Charlee X", before joining award-winning Nirvana tribute band, Pennyroyal.

Anyone for Doomsday?: Anyone for Doomsday?  is the third full-length album by Powerman 5000, and was originally slated as the follow-up to "Tonight the Stars Revolt! ".  It was pulled by PM5K frontman Spider One two weeks before the release date.  Due to being too similar to previous work, the album was originally intended to merely be delayed and revamped.  However, during this time conflicts began to arise causing longtime members Dorian 27 (Dorian Heartsong) and Al3 (Allen Pahanish) to leave the band.  As a result, the album was scrapped due to Spider's unwillingness to release an album of half new members and half old.  The album was available for a while on Powerman 5000's official website through Spider One's record label, Megatronic Records.  The promotional copies featured artwork that was different from the copies available on the website.  The album however was taken down due to legal reasons.  The album is now available in full on Spotify.  The physical copy of the album has become a collector's item.

Caladenia richardsiorum: Caladenia richardsiorum, commonly known as the little dip spider orchid, Richards' spider orchid or robe spider orchid, is a plant in the orchid family Orchidaceae and is endemic to South Australia.  It is a ground orchid with a single erect, hairy leaf and usually only one yellowish-green flower.  It is similar to the endangered Mellblom's spider orchid ("Caladenia hastata") but has a much larger leaf and the petals lack glandular tips.

Rob Zombie: Rob Zombie (born Robert Bartleh Cummings; January 12, 1965) is an American musician, filmmaker and screenwriter.  Zombie rose to fame as a founding member of the heavy metal band White Zombie, releasing four studio albums with the band.  He is the older brother of Spider One, lead vocalist for American rock band Powerman 5000.

Halfcocked: Halfcocked (also known as Half Cocked, Halfc*cked or Half-Cocked) was an American hard rock band.  Influenced by 1970s hard rock and punk rock, along with 1980s glam metal, they started out in Boston in 1997 and signed with independent label Curve of the Earth Records.  In 1999 the band placed third in the finals of the WBCN Rock & Roll Rumble, being the first "wild card" act to play in the finals.  They signed with DreamWorks imprint Megatronic Records (headed by Powerman 5000 frontman Spider One) and moved to Los Angeles in 2000.  After numerous delays, they released one final album—"The Last Star"—before splitting up.

When Worlds Collide (Powerman 5000 song): "When Worlds Collide" is a song by the band Powerman 5000 from their album "Tonight the Stars Revolt! ".  The song is virtually always the last song to be played at concerts .  It is one of the band's most well-known songs and has been used in the video games "Tony Hawk's Pro Skater 2", "WWE Smackdown!  vs. Raw", and in the 2000 film "Little Nicky".  Spider One has stated that the song is about social classes.  In 2016, the band accused Square Enix of stealing the song for use in their popular MMO "".

Caladenia longicauda subsp. extrema: Caladenia longicauda" subsp.  "extrema, commonly known as the late white spider orchid or Seaton Ross spider orchid is a plant in the orchid family Orchidaceae and is endemic to the south-west of Western Australia.  It has a single hairy leaf and one or two mainly white flowers with long, mostly spreading lateral sepals and petals.  It is a relatively rare orchid which is similar to the tangled white spider orchid (subspecies "redacta") but has larger flowers and a later flowering period.

Aleksi Sihvonen: Aleksi Sihvonen is the current vocalist for the Finnish band Medicated.  He replaced Norther's vocalist Petri Lindroos in 2009, until the group disbanded in 2012.  He was also the former guitarist and vocalist of Imperanon.

Spider One: Michael David Cummings (born August 25, 1968), better known as Spider One, is an American singer, songwriter, rapper, record producer, and director.  He is the founder and only consistent member of the nu metal band Powerman 5000 and the owner of Megatronic Records.  He created the horror/black comedy mockumentary series "Death Valley", which aired on MTV for one season in 2011.

Supporting paragraphs: Spider One Aleksi Sihvonen
Answer: singer