The best-selling singles in the country as listed in next week's issue of Billboard magazine:

SINGLES1. "Umbrella," Rihanna feat. Jay-Z. SRP/Def Jam/IDJMG.2. "Party Like a Rockstar," Shop Boyz. OnDeck/Universal Republic.3. "Big Girls Don't Cry," Fergie. will.i.am/A&M/Interscope.4. "Hey There Delilah," Plain White T's. Hollywood.5. "Buy U a Drank (Shawty Snappin')," T-Pain feat. Yung Joc. Konvict/Nappy Boy/Jive/Zomba.6. "Makes Me Wonder," Maroon 5. A&M/Octone/Interscope.7. "Girlfriend," Avril Lavigne. RCA/RMG.8. "Summer Love," Justin Timberlake. Jive/Zomba.9. "Rehab," Amy Winehouse. Universal Republic.10. "Make Me Better," Fabolous feat. Ne-Yo. Desert Storm/Def Jam/IDJMG.