типа Гвен издаст сборник би-сайдов и этих самых Collaborations

In late October 2006, Rice-Oxley collaborated with Gwen Stefani as a co-writer of the song "Early Winter", released later in 2007 as a single, from her album, The Sweet Escape, as well as two more tracks. Stefani had been wishing to work with the band since 2005 and Rice-Oxley responded by saying "we might give it a go"

в анг вики так и сказано, что есть еще некие 2 трека , кроме Early Winter, которые Гвен зажала((

Пусть отдаёт обратно