These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Atomic Kitten
Author's Saving Throw: After three unsuccessful singles, "Whole Again" was an all-or-nothing deal and it saved the band from being dropped.
Awesome Music: "The Last Goodbye", "Whole Again", "It's OK", "Nothing In The World".
Creator Breakdown: Liz suffered from depression ironically during the "Feels So Good" era.
Germans Love David Hasselhoff: The girls were extremely popular in Japan, even having a single released exclusively over there ("Cradle"). The girls also got four number 1s in New Zealand despite their tracks never being promoted over there. In fact, if their single didn't do well in the UK there was bound to be another country where they got to number 1. Their final singles did poorly due to low promotion but still got to number 1 in Taiwan.
Les Yay: Not that much but it was definitely there.
Narm Charm: "Cradle" is very sappy but still so very sweet and heartwarming.
Replacement Scrappy: Completely averted. Jenny is more fondly remembered than her predecessor Kerry.
She Really Can Act: The video for "The Last Goodbye". The first time the girls had to properly act a story in a video as opposed to just dancing and posing. And they nailed it.
Signature Song: "Whole Again", "The Tide Is High" and "Eternal Flame".
Silly Love Songs: "Love Doesn't Have To Hurt", "Cradle", "You Are" and countless album tracks.
Sweet Dreams Fuel: "It's OK", "Eternal Flame", "Love Doesn't Have To Hurt". Album tracks "Feels So Good", "Nothing In The World", "Always Be My Baby"
Unnecessary Makeover: Jenny and Natasha's separate attempts at short hair. Natasha's actually resembled a bad wig more than anything else.