co-wrote the song
... that American singer-songwriter Kelis co-wrote the song "Waiting" for Cheryl Cole's second album Messy Little Raindrops?
... that American singer-songwriter <a href="./Kelis" id="mwCM0" rel="mw:WikiLink" title="Kelis">Kelis</a> <b id="mwCM4"><a class="mw-redirect" href="./List_of_songs_recorded_by_Cheryl_Cole" id="mwCM8" rel="mw:WikiLink" title="List of songs recorded by Cheryl Cole">co-wrote the song</a></b> "Waiting" for <a class="mw-redirect" href="./Cheryl_Cole" id="mwCNA" rel="mw:WikiLink" title="Cheryl Cole">Cheryl Cole</a>'s second album <i id="mwCNE"><a href="./Messy_Little_Raindrops" id="mwCNI" rel="mw:WikiLink" title="Messy Little Raindrops">Messy Little Raindrops</a></i>?