A 2011 F1 season signed helmet, signed by all 24 drivers from the 12 2011 F1 teams including 2010 World Champion Sebastian Vettel and Mark Webber from Red Bull. 2009 World Champion Jenson Button and 2008 World Champion Lewis Hamilton from McLaren, seven times World Champion Michael Schumacher and Nico Rosberg from Mercedes, two times World Champion Fernando Alonso and Felipe Massa from Ferrari, Vitaly Petrov and Nick Heidfeld from Renault, Adrian Sutil and Paul di Resta from Force India, Rubens Barrichello and Pastor Maldonando from Williams, Sebastien Buemi and Jaime Alguersuari from Toro Rosso, Jarno Trulli and Heikki Kovalainen from Team Lotus, Timo Glock and Jerome d'Ambrosio from Virgin, Sergio Perez and Kamui Kobayashi from Sauber, Vitantonio Liuzzi and Narain Karthikeyan from HRT, other signatures include, test drivers Nico Hulkenberg (Force India), Karun Chandhok (Lotus), Daniel Ricciardo (Red Bull), Esteban Gutierrez (Sauber), Sakon Yamamoto (Virgin), Bruno Senna (Renault), Jules Bianchi (Ferrari), and Pedro de la Rosa (McLaren) Team Principles Christian Horner (Red Bull), Ross Brawn (Mercedes), Stefano Domenicali (Ferrari), Martin Whitmarsh (McLaren), Eric Boullier (Renault), Vijay Mallya (Force India) and Peter Sauber (Sauber) and F1 CEO Bernie Ecclestone.