Article continues below advertisementJustin and Hailey Bieber brought the heat to Kendall Jenner's 30th birthday bash.The "Peaches" singer, 31, and his model wife, 28, were spotted locking lips in front of massive silver balloons that read "Happy Birthday Kendall." Justin later shared the hot moment on Instagram, where Hailey was seen wrapping her arms around his neck as he grinned from ear to ear.Article continues below advertisementSource: @lilbieber/InstagramJustin and Hailey Bieber showed major PDA at Kendall Jenner's birthday party.