who is associated with the musical artists from pixie lott and selena gomez ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_associatedMusicalArtist dbr_Pixie_Lott sep_dot var_uri dbo_associatedMusicalArtist dbr_Selena_Gomez sep_dot var_uri a dbo_MusicalArtist brack_close