Simplify the following text for a Grade 6 native English-speaking person.
Original: `` Wonderwall '' and `` Champagne Supernova '' both went No. 1 on the U.S. Modern Rock Tracks chart , eventually being certified gold in the United States , whilst `` Wonderwall '' also topped the Australian ARIA charts .
Simplified: `` Wonderwall '' and `` Champagne Supernova '' both went # 1 on the U.S. Modern Rock Tracks chart . They would go on to be certified gold in the United States .