Alison Kemerer Cobb (née Irwin) was the runner-up of Big Brother 4 and later appeared in Big Brother 7.

On Big Brother 4, she was known for flirting with and manipulating several of the male houseguests and being a member of the Elite Eight alliance. When the Elite Eight crumbled, she formed an all-girls alliance with fellow houseguests Jun Song and Erika Landin known as Girl Power. Alison won the final HoH and decided to take Jun with her to final 2. The jurors were extremely disappointed with the final 2 and decided to vote for Jun over Alison, deeming her as the 'lesser of two evils,' thus making Alison the runner-up. Her ex-boyfriend Justin Giovinco was also in the house, as part of the X-Factor twist. During this season, she became the first houseguest in Big Brother history never to become nominated on eviction night. In fact, all three times the Power of Veto became used, it was to take Allison off the block.

On Big Brother All Stars, she was among the 14 out of 20 contestants chosen to go back into the house. In the first week, Alison, along with Danielle became part of a plan to make sure Jase disagreed with Janelle's nominations to make sure the two HoHs were automatically nominated together. It later backfired when Jase told Janelle about their plan, leading to both Alison and Danielle becoming nominated for eviction. When she did not win the PoV, Mike and Will campaigned for Alison, feeling that she would be a better ally to go after the Sovereign Six as opposed to Danielle. However, she was evicted by an 8 to 2 vote, becoming the first houseguest evicted. Alison later reappeared on Big Brother 7 as a part of the Big Brother Seance.


Alison Irwin (born August 7, 1980, in Pennsylvania) was a 22-year-old retail sales manager from Meadville, Pennsylvania.

Player History - Big Brother 4

Competition History

Week 1 Food Win
HOH Not Chosen
Food Win
POV Loss
Week 2 HOH Loss
Food Win
POV Loss
Week 3 HOH Loss
Food Win
POV Loss
Luxury Win
Week 4 HOH Win
Food Sat Out as HOH
POV Loss
Week 5 HOH Previous HOH
Food Win
Luxury Win
POV Loss
Week 6 HOH Loss
Food Win
POV Loss
Week 7 HOH Loss
POV Loss
Luxury Loss
Week 8 HOH Loss
Food Win
Week 9 HOH Loss
Food Win
Diamond POV Win
Luxury Win
Week 10 HOH Part 1 Win
HOH Part 2 Unable to Play
HOH Part 3 Win

Voting History

Week Position Voted for With Majority?
1 Amanda Craig Yes
2 Michelle Maradie Yes
3 Vetoed Jack Owens, Jr. No
5 Nathan Marlow Yes
6 Justin Giovinco Yes
7 Jack Owens, Jr. Yes
8 Used POV on Self Jee Choe Yes
9 Used DPOV on Self Erika Landin Sole Vote
10 HOH Robert Roman Sole Vote
Finale Runner-Up

HOH History

Original Nominees Post-Veto Nominees Intended Target
Week 4
Dana Varela
Week 10
Robert Roman

Player History - Big Brother 7

Competition History

Week 1 Co-HOH Loss
POV Loss

Voting History

Week Position Voted For With Majority?
1 Nominated

Post Big Brother

Alison and Donny in their promotion picture for the Amazing Race 5

  • In 2004, Alison and her Boyfriend, Donny competed on The Amazing Race 5. They won the first leg (due to two other teams making a mistake), but they were the second team eliminated, placing tenth.[1]
  • After Big Brother, Alison had since married and had a daughter.[2]


  • Alison is the first woman in Big Brother history to be vetoed, as well as the first player ever to veto oneself.
  • Alison is the first woman to be vetoed by another houseguest.
  • Alison is the first woman to use the Power of Veto.
  • In her first season, the three times the Power of Veto was used were on Alison.
  • Alison became the first woman to win the Power of Veto multiple times.
  • Alison is the first houseguest to be vetoed off the block multiple times.
  • Alison became the first woman to win the Power of Veto twice in a row.
  • Alison is the first houseguest in Big Brother history to win multiple HOHs and POVs in a single season.
  • Out of all houseguests in Big Brother 4, Alison won the most competitions, with 4 (2 HoH's & 2 PoV's).
  • Alison became the first houseguest on Big Brother (US) to make it to the Final Two without being a nominee on eviction night. She was followed by Drew Daniel, Ricky Williams and Cody Calafiore (on Big Brother 22). Counting Big Brother Canada, this list also includes Jon Pardy and Kevin Martin.
  • Alison is the only woman on Big Brother 4 to win Head of Household and the Power of Veto more than once.
  • Alison is the first houseguest to win the Power of Veto competition before nominations become made. It would happen again in Big Brother 14, when Ian became the PoV holder before Frank made his nominations, as a consequence of Frank opening Pandora's Box.
  • Alison became the first of 17 to compete on another CBS reality show aside from Big Brother, competing in The Amazing Race. She was followed by Jordan Lloyd, Jeff Schroeder, Rachel Reilly, Brendon Villegas, Hayden Moss, Caleb Reynolds, Jeff Weldon, Jackie Ibarra, Cody Nickson, Jessica Graf, Janelle Pierzina, Britney Haynes, Elissa Slater, Nicole Franzel, Victor Arroyo and Winston Hines.
  • Alison is the only person from seasons 4, 5 or 6 to be chosen by production to be in Big Brother 7. Everyone else from those seasons who made the cast were voted in by America.
  • Alison was the first houseguest to be evicted as a returning player.


Big Brother 4 (US) Houseguests
Square-Jun Song.jpg
Square-Alison Irwin.jpg
Square-Robert Roman.jpg
Square-Erika Landin.jpg
Square-Jee Choe.jpg
Square-Jack Owens, Jr..jpg
Square-Justin Giovinco.jpg
Square-Nathan Marlow.jpg
Square-Dana Varela.jpg
Square-David Lane.jpg
Square-Michelle Maradie.jpg
Square-Amanda Craig.jpg
Square-Scott Weintraub.jpg
Big Brother 7 (US) Houseguests
BB7 Mike.png
BB7 Erika.png
BB7 Janelle.png
BB7 Will.png
BB7 George.png
BB7 Danielle.png
BB7 James.png
BB7 Howie.png
BB7 Marcellas.png
BB7 Kaysar.png
BB7 Diane.png
BB7 Jase.png
BB7 Nakomis.png
BB7 Alison.png
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