sentences:  By 1986 he was responsible for (either writing or producing) all 11 of the band's UK Top 20 hits.Since then, he has also written for Eminem, The Wanted, Celine Dion, Cliff Richard, Ronan Keating, Diana Ross, Westlife, Boyzone, Cher, Johnny Hallyday, and Queen.These writing credits include Celine Dion's "Think Twice" (1994), which reached number one in the charts of Belgium, Denmark, Ireland, Netherlands, Norway, Sweden and the United Kingdom.