G irl friend " ▁also ▁deb uted ▁at ▁number ▁one . ▁In ▁ 1 9 9 8 , ▁Pi per ▁released ▁her ▁debut ▁studio ▁album , ▁H oney ▁to ▁the ▁B , ▁which ▁was ▁cert ified ▁plat in um ▁by ▁the ▁British ▁Ph on ographic ▁Indust ry . ▁In ▁ 2 0 0 0 , ▁she ▁released ▁her ▁second ▁studio ▁album , ▁Walk ▁of ▁Life , ▁which ▁respectively ▁produced ▁the ▁successful ▁singles ▁“ Day ▁& ▁Night ” ▁and ▁“ Something ▁Deep ▁Inside ”. ▁In ▁ 2 0 0 3 , ▁Pi per ▁announced ▁that ▁she ▁had ▁abandoned ▁her ▁music ▁career ▁to ▁focus ▁on ▁an ▁acting ▁career . ▁ ▁Pi per ▁appeared ▁as ▁a ▁series ▁regular ▁in ▁the ▁BBC ▁sci - fi ▁series ▁Doctor ▁Who ▁( 2 0 0 5 - 2 0 0 6 ), ▁in ▁the ▁role ▁of ▁Rose ▁Ty ler , ▁companion ▁to ▁The ▁Doctor . ▁She ▁repr ised ▁the ▁role ▁in ▁ 2 0 0 8 , ▁ 2 0 1 0 , ▁and ▁ 2 0 1 3 . ▁Pi per ▁star red ▁as ▁the ▁high - f lying ▁esc ort ▁Belle ▁de ▁J our ▁in ▁the ▁television ▁drama ▁series ▁Secret ▁Di ary ▁of ▁a ▁Call ▁Girl ▁( 2 0 0 7 - 2 0 1 1 ). ▁She ▁also ▁star red ▁as ▁Bron a ▁Cro ft / L ily ▁in ▁the ▁Show time ▁horror ▁series ▁Pen ny ▁D read ful ▁( 2 0 1 4 - 2 0 1 6 ). ▁Pi per ▁has ▁appeared ▁in ▁films ▁such