"I look forward to Australia hearing my song and working alongside friends and fellow musicians on this journey", says Amorosi.
Amorosi hinted to SBS that her submission will be one of the tracks from her latest album Back to Love, while Donovan has collaborated with songwriter Justine Eltakchi on Proud.
The other artist announced today was 2004 Australian Idol victor Casey Donovan.
Donovan is no stranger to Eurovision: Australia Decides as she opened last years inaugural show with her rendition of Guy Sebastian's Eurovision entry, Tonight Again.
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Hosted by SBS Eurovisionaries comedian Joel Creasey and music buff Myf Warhurst, Eurovision - Australia Decides will showcase the best of Australian music and bring the nation closer to the Eurovision action.
Donovan may have some nerves to conquer at the selection contest on the Gold Coast in February as she is an Amorosi fangirl. She is now starring in the musical Chicago.
'When I was asked I thought, what an fantastic thing to be a part of!
Eurovision - Australia Decides will be presented at the Gold Coast Convention and Exhibition Centre on Friday 7 and Saturday 8 February and tickets for the Opening Night Show, Matinee Show and Live TV Final are now on sale.
'I can't wait to share the stage with some of Australia's most talented singers. "Vanessa Amorosi [is] my idol, I love her", she says. Seeing as Eurovision rules state a song can be a maximum of three minutes in length, and only one song on the album clocks under that limit, we feel pretty confident saying Gimme Your Love is the tune she'll take to the stage.
The legally blind artist fears she failed to progress during auditioning processes for X Factor, The Voice and Idol because she "didn't fit the mold".
SBS commissioning editor for entertainment Josh Martin said: "This is the first taste of what is going to be a very special weekend of Australian music!" From the incredible outfits, dance routines, campy songs and more - it's a feast for the eyes. And there continues to be very wishful thinking for the Minogue sisters (together or individually) which will sadly never happen.
Vanessa Amorosi's song-writing ability and dynamic vocal range have seen her sell over two million records worldwide.