"Apparently he was exceptional with Nick -- I wasn't there -- so he would be my number one choice and I have been thinking about others, " Montgomerie added.

CNN: Montgomerie reveals agreement with Olazabal

Their recording of the Hollies' 1969 hit He Ain't Heavy, He's My Brother was the Christmas number one.

BBC: Sir Paul McCartney

Her UK number one hits include Can't Get You Out Of My Head (Kylie Minogue), Toxic (Britney Spears), I Kissed A Girl (Katy Perry), About You Now (Sugababes) and Anything Is Possible (Will Young).

BBC: Hit maker Cathy's road to success