Wigmore won four Tuis - album of the year for her debut Holy Smoke, as well as breakthrough artist of the year, best pop album and highest-selling LP.
Australian Idol winner Walker also won four, mainly from the popular vote with the people's choice award, airplay record of the year, highest-selling single and international achievement awards.
But Kids of 88 and Anika Moa stopped a Wigmore clean-sweep.
Auckland pop duo Kids of 88 took best single for Just a Little Bit, which also won director Tim Van Dammen the video prize.
Relative veteran Moa pipped Wigmore in the solo female artist category.
Dane Rumble lost to Wigmore in most of the categories for which he was nominated, but won the award for best male solo artist.
Among the bands, Wellington's Phoenix Foundation added one more, best group, to their three earlier technical prizes for their album Buffalo, but lost out to The Checks' Alice by the Moon for best rock album.
The Checks' win helped make it, with Wigmore's success, a big night for acts from Auckland's North Shore.
Auckland retro-soul outfit the Open Souls took away the Aotearoa roots album prize, while Bulletproof won the electronica album for his recent dubstep LP, Soundtrack to Forever, over higher-profile acts Shapeshifter and P-Money.
The ceremony concluded with Shihad receiving the Legacy Award and being inducted into the NZ Music Hall of Fame in recognition of its years as a dominant and influential force in Kiwi rock.
