Teenage pop stars 5 Seconds Of Summer have become the first Australian group to top the U.K.'s singles chart in 14 years. The boyband, which supported One Direction on tour last year (13), dethroned Duke Dumont's I Got U to take the number one spot with its hit She Looks So Perfect. The last song by an Australian artist to hit pole position was Don't Call My Baby by Madison Avenue in 2000. Last week's (begs24Mar14) chart-topper fell to second place, followed by Changes by French DJ duo Faul & Wad Ad vs Pnau, who entered the countdown at three, while Route 94's My Love and John Legend's All Of Me rounded out the top five. Meanwhile, the latest winner of Britain's The X Factor, pregnant singer Sam Bailey, has debuted her first release, The Power of Love, at number one on the albums chart. George Michael's Symphonic slipped to two, while Roger Daltrey and terminally-ill rocker Wilko Johnson's Going Back Home entered at three.