The gig came on the heels of her role as Miss Hannigan in 'Annie', which hits theaters on December 19, reported Ace Showbiz.
This would be the 42-year-old actress' fourth time leading the variety show after hosting in 1998, 2002 and 2005.
She also appeared occasionally including the time she introduced then-boyfriend Justin Timberlake as a musical performer in 2006.
Diaz's turn as host is scheduled on November 22 with Bruno Mars and Mark Ronson teaming up as musical guests.
Mars and Ronson collaborated in the latter's hit 'Uptown Funk'. Mars had hosted the show previously.