Los Angeles, July 13 : Singer Jessica Simpson has written a love letter to herself for her 42nd birthday. The singer shared the tribute on Instagram alongside a picture of her wearing a black dress, reports femalefirst.co.uk. She told her 6.1 million followers: "Oh lil Mrs 42 look at you leanin' into the moonbeams to recharge and radiate a purposeful glowing heart. I am very proud of my faith, resilience and strength over the last 4 decades. "Everything in my life that has or hasn't happened yet makes turning 42 very exciting because I know what it takes personally to remain inside of DETERMINED PATIENCE. I know myself and I do love her very much. "I know my purpose and I must say that ladies and gents I am equipped to waltz within every dream I own confidently. I am humbled and honoured to finally be my own best friend. Ok 42 time to Rock 'n' Roll." The 'Employee of the Month' actress also shared a look at her birthday party, posting photos with friends and family, including her husband Eric Johnson and parents Tina and Joe Simpson. They included a shot of Simpson blowing out a sparkler candle on a birthday cake. She posted about a gift from her nine-year-old son, Ace, who gave her a robot costume made from cardboard boxes and a note that said: "Best mom ever in the world. I love you so much." Simpson, who has daughters Maxwell, 10, and Birdie Mae, three, with Johnson as well as Ace, also showed off her bikini body in posts about a Fourth of July break to Lake Austin, Texas. She said: "We asked the kids where they wanted to go for their summer trip and out of everywhere, they chose Texas to be with their cousins. "It was a sentimental and nostalgic blast of a week." /IANS