Australian designers battling to dress Delta Goodrem on her wedding day following engagement to longtime boyfriend Matthew Copley

Delta Goodrem says she's 'extremely thankful and lucky' as she opens up about engagement to longtime boyfriend Matthew Copley

Delta Goodrem is all smiles as she shows off her huge diamond engagement ring - after long-term boyfriend, and guitarist, Matthew Copley popped the question to her

Australian celebrities Sophie Monk, Rebecca Judd and Samantha Jade lead engagement congratulations for Delta Goodrem and longtime boyfriend Matthew Copley