This is incredibly sweet.

Carey Hart has taken to Instagram to gush about his wife Pink. The singer celebrated her 40th birthday over the weekend, with Carey proclaiming that she's getting better with age. Sharing numerous pictures of them as a couple and a family, he wrote: "Welcome to 40 baby. I’ve celebrated 18 birthdays with you, and I can say it’s amazing growing up with you. "The person you have grown into is inspiring. You have become a successful business woman, superstar, dedicated mother, Philanthropist, supportive wife, wine maker, motorcycle mama, and amazing friend to all around you. "I’m so proud of the woman you have become, and you are more beautiful than ever. You truly are like wine. You just keep getting better, and I’m so lucky to be along on this crazy ride with you. "I love you baby. Looking forward many, many more birthdays with you. I can’t wait to see how nuts you and I are in our 80’s." Pink and Carey have had many ups and downs throughout their relationship. They first started dating in in 2001 with Pink asking him to marry her in 2005. They married in 2006 but then announced their separation in 2008. In 2009 they rekindled their romance and welcomed their daughter Willow in 2011. They welcomed their second child Jameson Moon in 2016.