Spears United At Kids’ Pre-school Graduation

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June 26, 2010 | 9:45am EST

Former couple Britney Spears and Kevin Federline briefly reunited on Thursday to attend their sons Jayden James and Sean Preston’s pre-school graduation ceremonies.
Spears’ divorced parents, Jamie and Lynne, also put on a united front at the San Fernando Valley school in California.

Spears and Federline split in 2006 after a two-year marriage. Federline, 32, won sole custody of the kids in 2008. The pop star is allowed weekly visits with her boys.