Madyson Doucet

Madyson D. has 628 Justin Bieber memorabilia items in her collection.

Wimbledon Studios Beach Bar

A total of 14 celebrities have signed the beach bar whiteboard at Wimbledon Film & TV Studios. These include Matt LeBlanc, Barbara Windsor, Tasmin Greig, Gemma Arterton, Reese Shearsmith, Steve Pemberton, Tom Conti, Stephen Mangan, Stephen Mulhern, David Crane, Jeffery Klarik, Harry Hill, Adam Deacon, and Conleth Hill. See more photos here.

PromaxBDA

At a PromaxBDA Emerging Media Workshop in New York City, 40 people in one room tweeted Justin Bieber at the same time. The record was led by RecordSetter CEO Dan Rollman, who spoke at the event.

Mr. S.

Mr. S. sent celebrities a tweet on his July 14th birthday, requesting a birthday wish. He mentioned in an attached link that for each wish he received he would donate $3.00 to Open Door Shelter in Norwalk, Connecticut. Twelve verified celebrities responded to his request in 24 hours. Read more about the feat here.

Sarvesh Soni

Dr. Sarvesh Soni has 16,782 autographs in his collection. The autographs are from VIP's of 205 countries. He started collecting in 1991.

See some of the collection here.

Jason Antone

Jason Antone, host of the JROCK Show, received phone messages from 246 celebrities in three years. All calls were received between 2006 and 2009. Some of the celebrities who called him include Mick Foley, Steven Burns and David Arquette.

See the full list of celebrities here.

Brett Kanter

Brett Kanter took 21 minutes, 7.30 seconds to fully dissolve a Pep-O-Mint Lifesaver on his tongue

Jaana A

Jaana A. and other fans from 30 countries around the world wrote a fan letter to Jedward measuring 400 meters in length.

OtraMovida Records

Cristina Pedroche, a reporter at Otra Movida, hit 27 people in the face with pies in 30 seconds while wearing roller skates.

Thomas Zolotor

Thomas Zolotor listed nine different celebrities who were born under the astrological sign of Pisces in a single tweet.

Alina Cho

CNN reporter Alina Cho performed a network news signature sign-off 38 times in 30 seconds.

Cho set the feat during a live CNN morning news program in New York City. RecordSetter Council president Dan Rollman and co-founder Corey Henderson presided over the attempt.

David Marvin

David Marvin listed 20 different celebrities who have Sagittarius as their astrological sign in a tweet.

Dinesh Shivnath Upadhyaya

Dinesh Shivnath Upadhyaya listed 17 living celebrities who shared his birthday, January 16, in a singletweet.

Chelsi Hammond

Chelsi Hammond named 47 male celebrities in 30 seconds. The 48th name, Matthew McConaughey, fell outside the 30-second mark and was not included in final count.

Dinesh Shivnath Upadhyaya

Dinesh Shivnath Upadhyaya listed 21 different celebrities who have Cancer as their astrological sign in a tweet.