Question: What American actor, better known by his stage name Alphacat, performed "Barack Obama vs. Mitt Romney," a song and music video, along with Peter "Nice Peter" Shukoff, and Lloyd "EpicLLOYD" Ahlquist?

Context paragraphs:
Iman Crosson: Iman Crosson (born March 27, 1982), better known by his stage name Alphacat, is an American actor, impressionist and YouTube personality and is known for his impersonations of former U.S. President Barack Obama and his starring role in independent film "Along the Roadside".

Barack Obama vs. Mitt Romney: "Barack Obama vs. Mitt Romney" is a song and music video, performed by Iman Crosson, Peter "Nice Peter" Shukoff, and Lloyd "EpicLLOYD" Ahlquist.  It is the 8th episode of the 2nd season of the YouTube video series "Epic Rap Battles of History".  The video was released on 15 October 2012 on the show's YouTube channel in anticipation of the 2012 US presidential election.

Presidency of Barack Obama: The presidency of Barack Obama began at noon EST on January 20, 2009, when Barack Obama was inaugurated as President of the United States, and ended on January 20, 2017.  Obama, a Democrat, took office as the 44th United States president following a decisive victory over Republican John McCain in the 2008 presidential election.  Four years later, in the 2012 election, he defeated Mitt Romney to win re-election.  He was the first African American president, the first multiracial president, the first non-white president, and the first president to have been born in Hawaii.  Obama was succeeded by Republican Donald Trump, who won the 2016 presidential election.

Einstein vs. Stephen Hawking: "Einstein vs. Stephen Hawking" is a song and music video, performed by Zach Sherwin, Peter "NicePeter" Shukoff, and Lloyd "EpicLLOYD" Ahlquist.  It is the 7th episode of the 1st season of the YouTube video series "Epic Rap Battles of History".  The video was released on 30 March 2011 on Shukoff's YouTube channel.

Planned presidential transition of Mitt Romney: The planned presidential transition of Mitt Romney, better known as the Romney Readiness Project, refers to the planned transfer of power from President Barack Obama to Mitt Romney, the Republican Party's candidate for president in the 2012 presidential election.  Because Barack Obama was reelected as President, the transition did not take place.

Peter Shukoff: Peter Alexis Shukoff (born August 15, 1979), also known as Nice Peter, is an American comedian, musician and Internet personality.  A self-described "Comic/Guitar Hero," he is best known for the comedy on his YouTube channel, NicePeter, especially the comedic series "Epic Rap Battles of History".  As of June 8, 2016, NicePeter has over 2.6 million YouTube subscribers.  The day after hitting one million subscribers, the video game channel G4 crowned Nice Peter the King of Dot Comedy on "Attack of the Show".  His two channels, Nice Peter and Epic Rap Battles (ERB) have a total of over 16 million subscribers, and 3.5 billion views as of January 2017.  He also has a third channel that he uses for vlogs and "Monday Shows", a show that he uploads on either Mondays or Tuesdays that he shows a couple different segments including "Viewer Mail", "Twitter Question Time", and "Ask a Giraffe".  They have been featured on the Huffington Post, Billboard.com, and the January 2012 issue of "Wired".  An interview with "Forbes" details Peter and his partner Lloyd Ahlquist's rise to fame.

Epic Rap Battles of History: Epic Rap Battles of History, or ERB for short, is a YouTube webseries created by Peter Shukoff (a.k.a. Nice Peter) and Lloyd Ahlquist (a.k.a. EpicLLOYD).  The series puts famous historical and pop culture figures, real and fictional, against one another in a rap battle format.  As of July 2017, it is the 43rd most subscribed channel on YouTube with over 14.2 million subscribers and over 3.3 billion total video views.

List of Epic Rap Battles of History episodes: "Epic Rap Battles of History" is a YouTube series created by Peter "Nice Peter" Shukoff and Lloyd "EpicLLOYD" Ahlquist.  The first episode of the series "John Lennon vs. Bill O'Reilly" was released on September 26, 2010.  All Season 1 episodes were uploaded to Shukoff's personal YouTube channel, "Nice Peter".  Following the show's popularity and success, Ahlquist and Shukoff partnered with Maker Studios, and created two channels devoted to the series.  "ERB" hosts the finished episodes, and "ERB2" features behind-the-scenes footage.

United States presidential election in Utah, 2012: The 2012 United States presidential election in Utah took place on November 6, 2012 as part of the 2012 General Election in which all 50 states plus The District of Columbia participated.  Utah voters chose six electors to represent them in the Electoral College via a popular vote pitting incumbent Democratic President Barack Obama and his running mate, Vice President Joe Biden, against Republican challenger and former Massachusetts Governor Mitt Romney and his running mate, Congressman Paul Ryan.  Prior to the election, all 17 news organizations considered this a state Romney would win, or otherwise considered as a safe red state.  Utah is among the most heavily Republican states, voting for the Republican ticket in every presidential election since 1968, and is also the only state to have a majority Mormon population, benefiting Romney, the first Mormon to head a major party presidential ticket.  He carried every county in the state, all by large margins.  However, Obama would go on to win reelection nationwide.

Lloyd Ahlquist: Lloyd Leonard Ahlquist (born January 18, 1977), better known by his online alias EpicLLOYD, is an American internet personality best known for the YouTube video series "Epic Rap Battles of History", along with Peter Shukoff ("Nice Peter").  Ahlquist has performed as an MC, actor, improviser and writer.  In addition to the rap battles, Ahlquist, along with Shukoff, appeared in a cameo in "".

Supporting paragraphs: Barack Obama vs. Mitt Romney Iman Crosson
Answer: Iman Crosson