Keith Urban's daughter Sunday is obsessed with the word ''weird''.

The country musician and his wife Nicole Kidman have two daughters, five-year-old Sunday and Faith, three, together and every week their kids do something to surprise him and they pick up new words which they can't stop using.

Speaking at the Grammy Awards last night (26.01.14), he said: ''Every week there's something new going on. There's a new move. There's a new word in their vocabulary. Right now for Sunday, everything's 'that's weird.' ''

Keith, 46, can understand why Sunday has latched onto that word, adding: ''Everything's weird for a five-year-old ... sometimes she's right!''

'The Voice' coach was nominated for the Grammy for Best Country Duo/Group Performance for the track 'Highway Don't Care', which he recorded with Tim McGraw and Taylor Swift, but lost out to The Civil Wars' 'From This Valley'.

He also took the stage at the Staples Center in Los Angeles with Gary Clarke Jr. to perform 'Cop Car'.

Keith was also seen shedding a tear in the audience when Queen Latifah married 33 couples during the ceremony as Macklemore and Ryan Lewis performed their hit 'Same Love' which was followed by Madonna singing her 1986 hit 'Open Your Heart'.