Related Clues:

• Chart-topping songs
• They may be shortened via bit.ly
• Domain names
• Successful songs
• Addresses with dots
• Skeet feats
• Frequently downloaded songs
• Web addrs.
• 'Billboard' entries
• Thwacks
• bitly.com shortens them
• Search engine count
• WWW pages
• Top 40 station's playlist
• Bing info