Scarlett Johansson (R) and Michael Caine

US actress Scarlett Johansson (R) and Br

US actress Scarlett Johansson (R) and British actor Michael Caine walk on stage at the Nobel Peace Prize concert in Oslo Spektrum on December 11, 2008. Hollywood actress Scarlett Johansson hosts the concert, this year honouring laureate Martti Ahtisaari of Finland. Ahtisaari, a former Finnish president, won the 2008 Nobel Peace Prize for his efforts to mediate conflicts around the world for more than three decades.  AFP PHOTO / Heiko Junge / SCANPIX NORWAY (Photo credit should read Junge, Heiko/AFP/Getty Images)