Former couple Britney Spears and Kevin Federline briefly reunited on Thursday (24Jun10) 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.