'Horton' holds on to top spot at box office

• Story Highlights
• For the second straight week, the No. 1 movie is "Dr. Seuss' Horton Hears a Who"
  
• The animated film made $25.1 million, according to studio estimates
  
• The 10-day total for "Horton" is now $85.5 million
  
• Tyler Perry's latest movie finishes second at box office with $20 million debut
  
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