10 Most Fascinating Events

From Britney's engagement to Lance Armstrong's record Tour de France win, take a peek at the people who made summer sizzle. By Serena Kappes

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MOST ENGAGING

"I'm feeling everything," Britney Spears, 22, said about proposing marriage to boyfriend Kevin Federline, 26, in June on a flight from Ireland to New York, during her Onyx Hotel tour (cut short when she injured her knee). The singer, already a stepmom-to-be to Federline's 2-year-old daughter, Kori, became one again in July when his ex-girlfriend, actress Shar Jackson, gave birth to their second child, son Kaleb. Britney gave a preview of herself dressed as a bride in her recent "My Prerogative" video.