Katy Perry congratulates first-time mom Rihanna on birth of her baby boy: 'I'm so happy for her'

Katy Perry Addresses Rumors She Moved to Kentucky (Exclusive)

Katy Perry Adorably Congratulates New Mom Rihanna

Ooh Na-Na What’s His Name? Rihanna and ASAP Rocky Are ‘So in Love’ With Their ‘Adorable’ Baby Boy