The Aussie, whose former protege Matt Cardle is up for best British single for his cover of When We Collide, said she wanted to see Plan B scoop the British male solo category.
Asked what she thought of the British female solo nominees, she told AOL Music: “Cheryl Cole has stormed the charts with her records and beguiled us all with her charm – I love that her lyrics are passionate and personal – they get me every time.”
Cheryl is up against Ellie Goulding, Laura Marling, Paloma Faith and Rumer for the British female solo gong.
“The most exciting for me has to be Matt Cardle’s nomination for When We Collide,” Dannii added.
“I would love to see him collecting an award for this monster single. It couldn’t happen to a nicer person – this is your year Mr Cardle!”
Dannii also tipped her sister Kylie in the international female category, against the likes of Rihanna and Katy Perry.
The Brit Awards will take place at the O2 Arena on February 15, hosted by James Corden.