Katy Perry and Orlando Bloom are doting parents to their baby daughter Daisy Dove, who they welcomed at the end of August.And on Tuesday, the family marked a new milestone together as they celebrated Orlando's son Flynn's tenth birthday with Daisy for the first time.MORE: Katy Perry's fans can't get over her sweet reaction to baby Daisy in new videoThe Hollywood actor shares Flynn with ex-wife Miranda Kerr, and he splits his time between his parents' houses. VIDEO: Katy Perry makes rare comment