Thực đơn
Hard (bài hát) Tham khảoThực đơn
Hard (bài hát) Tham khảoLiên quan
Hard rock Hard Candy (album của Madonna) Hardcore punk Hardwell Hard to Say I'm Sorry Hard Rock Cafe Hard house Harder, Better, Faster, Stronger Hard Target Hard (bài hát)Tài liệu tham khảo
WikiPedia: Hard (bài hát) http://pandora.nla.gov.au/pan/23790/20100205-0000/... http://www.billboard.com/charts/year-end/2010/hot-... http://www.billboard.com/charts/year-end/2010/hot-... http://www.riaa.com/gold-platinum/?tab_active=defa... https://www.billboard.com/music/Rihanna/chart-hist... https://www.officialcharts.com/search/artists/Riha... https://swedishcharts.com/showitem.asp?interpret=R... https://charts.nz/showitem.asp?interpret=Rihanna&t... https://web.archive.org/web/20140621100846/http://... https://web.archive.org/web/20160415124842/http://...