In Part 2, I revealed my top girl group of all time: Bananarama. Despite the fact that for the majority of their 30+ year existence, Bananarama has been a duo, their period of greatest success was as a trio.
But there are several female duos I didn't include in my girl groups list since the word "group" generally implies three or more members. Hey, if it's good enough for the Grammys to distinguish between duos and groups, then it's good enough for me.
Some acts that didn't quite make the cut for my top 5 include M2M, S.O.A.P., Pepsi & Shirlie and Mary Mary. But now, without further ado: my favourite female duos of all time...
5. Mini Viva
Members: Frankee Connolly, Britt Love
Years (releasing music): 2009-2010
Top 3 best songs: "One Touch", "Left My Heart In Tokyo", "I Wish"
They shone so brightly for such a short period of time, but even though their lifespan was brief, Mini Viva still managed to release some of the best pop singles of the late '00s. Like Girls Aloud, production house Xenomania was responsible for the music - and while only "Left My Heart In Tokyo" was a substantial hit in the UK, the other two songs mentioned above both should've been big.
4. Mel & Kim
Members: Kim and Mel Appleby
Top 3 best songs: "Respectable", "Showing Out (Get Fresh At The Weekend)", "F.L.M."
I was actually surprised Mel & Kim weren't higher in my ranking (there's a spreadsheet involved in working out all my lists, by the way) but they were only able to release four singles (the three listed above and "That's The Way It Is") before Mel's ill health forced them to put music on hold.
Tragically, Mel wouldn't survive her battle with cancer - but fans of the music she made with sister Kim will always have those four singles, not to mention one of the best pop albums of all time in F.L.M., to remember her by. Kim returned to the charts (the UK ones, at least) in 1990 with "Don't Worry", the first of a run of great solo singles.
3. Booty Luv
Members: Cherise Roberts, Nadia Shepherd
Top 3 best songs: "Some Kinda Rush", "Shine", "Say It"
Before becoming Booty Luv, Cherise and Nadia were both members of short-lived UK R&B group Big Brovaz, who had a couple of big hits in Australia with "Nu Flow" and "Baby Boy" in 2003.
After that group self-destructed, the girls were signed to perform cover versions of American R&B tracks - but with a twist. Booty Luv's versions of songs like Tweet's "Boogie 2nite" and Luther Vandross' "Shine" were based on popular dance mixes of the originals rather than the album versions or radio edits.
Their dancefloor-friendly album also included covers of remixed songs by Mary J Blige and Lucy Pearl, but they proved with "Some Kinda Rush" (my favourite song of theirs) that their original tracks weren't too shabby. A second album has been in the offing for ages, but looking less and less likely as time goes on.
2. The Veronicas
Members: Jessica and Lisa Origliasso
Top 3 best songs: "4ever", "This Love", "I Can't Stay Away"
Brisbane sisters Jess and Lisa were hotly tipped for world domination when they launched in an explosion of catchy choruses and fun film clips in 2005, but despite five singles being lifted from debut album The Secret Life Of..., that international success failed to materialise. Luckily, Australia was smitten with the twins and a second album was guaranteed - with Hook Me Up proving to be the album that contained that elusive worldwide hit, "Untouched".
Although The Veronicas' music has morphed from Pink-style powerpop ("4ever" even has the same chorus structure as "U + Ur Hand") to synth-based electropop over the years, one thing's remained the same: the girls have always known their way around an infectious tune.
Members: Lena Katina, Julia Volkova
Top 3 best songs: "All The Things She Said", "How Soon Is Now", "All About Us"
Yeah, this result was another surprise for me, too - but it's often forgotten that Russia's faux lesbians racked up a number of excellent singles in their time together.
Their debut English-language album, 200km/h In The Wrong Lane, might have included worldwide smash "All The Things She Said", but second album Dangerous And Moving was actually much stronger - although by then, the gimmick had worn off for a lot of people.
Sure, their voices sometimes sounded dangerously close to those of Alvin & The Chipmunks - never more so than on their sacrilegious (but brilliant) cover of The Smiths' "How Soon Is Now" - but somehow it worked. Well, it did for me, anyway.
Girl groups: the best of the rest
Whether they weren't around long enough to produce enough great songs, or were but didn't, the girl groups below are all worthy of recognition.
Best song: "That's What Love Can Do"
Best song: "Come And Get Me"
Best song: "Let Me Be The One"
Best song: "Sweet Love 2K"
Best song: "Girls On Top"
Best song: "Sooner Or Later"
Best song: "End Of The Line"
Best song: "Everyday Of The Week"
Best song: "Good Love"
Mary Jane Girls
Best song: "All Night Long"
Salt 'n' Pepa
Best song: "Push It"
Best song: "Two To Make It Right"
Best song: "Right Here (Human Nature)"
The Three Degrees
Best song: "The Runner"
Best song: "Hold On"