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|Born||31 August 1971 (age 41)|
|Notable works and roles||Gift Grub|
However, he is now best known for the popular Gift Grub segments which have featured on the Ian Dempsey breakfast show on Today FM since 1999. Gift Grub is a series of comic sketches, impersonations and parodies that have featured Rosenstock assuming the personae of Bertie Ahern, Ronan Keating, Colin Farrell and Roy Keane amongst many others; he also provides the manic voice of Right Price Tiles radio spokesperson "Daft Dave".
Rosenstock performed an impersonation of José Mourinho in a parody of a song from the musical Joseph and the Amazing Technicolor Dreamcoat. This spread like wildfire on Internet message boards and eventually it was played on a Sky Sports broadcast. Mourinho had heard the song and enjoyed the impersonation so much he asked Rosenstock to perform a private show for him and the Chelsea squad. Rosenstock later released, with Mourinho's blessing, a single version of "José and his Amazing Technicolor Overcoat". He also released another song ("I Sign a Little Player or Two") on the internet with a parody of Mourinho in an interview then breaking into song.
In 2005, he starred as Keano in the comedy musical play I, Keano, which concerns Keane storming out of the Republic of Ireland national football squad during preparations for the 2002 FIFA World Cup.
In 2005, Rosenstock achieved the Christmas number one single in the Irish music Charts, with a parody of Will Young's song Leave Right Now (which itself was a Christmas number-one in 2003). The parody concerned Roy Keane's controversial departure from Manchester United and his falling-out with Alex Ferguson. As of 2011, Rosenstock is the last Irish national to top his country's Christmas charts; since 2006, winners of British series The X Factor have topped the Christmas charts in Ireland every year.
Between December 2007 and May 2009, Rosenstock worked on a puppet comedy series entitled Special 1 TV (originally I'm on Setanta Sports), which was presented as a parody weekly football talk show hosted by "José Mourinho". Rosenstock voiced all the puppet characters on the sketch, with the exception of "Rafael Benitez", who was performed by Keith Burke, including the main character Mourinho, his studio co-hosts "Sven-Göran Eriksson" and "Wayne Rooney", and regular phone-in callers like "Alex Ferguson", "Arsène Wenger", "Roy Keane" and "Mick McCarthy", as well as the non-football-related characters, Nelson Mandela, Willie Nelson, Barack Obama and Tom Cruise.
Outstanding Achievement Award at the 11th annual PPI (Phonographic Performance Ireland) Radio Awards.