141. You are one of the kindest and loveliest people I know. I'm glad that we're not just sisters, but that we're also best of friends! Happy birthday!
142. I am so grateful to have a sister like you in my life.
143. Happy birthday dearest sister. I wish I were as good a sister to you as you are to me, I'm so lucky to have you. Thanks for always believing in me and cheering me on in life!
144. A little sister time is good for the soul.
145. I'm so grateful to have you as my sister and my best friend. Wishing you all the happiness your birthday can hold!
146. Sisters speak a language that only we understand. It’s our special sibling power. Happy birthday!
147. We are sisters by chance but friends by choice. Happy birthday, love!
148. The only thing better than having you as my sister is my children having you as their aunt. Happy birthday!
149. In good times and bad, I'm so glad you're my sister-in-law. Wishing you a birthday that's as wonderful as you are!
150. I may be the older sister, but I’ve learned so much from you. Thank you for being an incredible younger sister. Happy birthday!
151. Today we celebrate the person who brings so much joy to our lives. Happy birthday, sister.
152. Happy birthday to my number one, absolutely incredible sister! True, you are my only sister, but you truly are the best one I ever had!
153. Thank you for always being there for me. You are the real gift today! May all of your dreams and wishes come true - you deserve it all and more. Happy birthday!
154. You brighten up every room with your sparkling personality, and have a way of making everyone else feel special. You're one of a kind and I'm so lucky to have you as my sister. I hope you have a very happy birthday and that all your kindness comes back to you on this special day!
155. Happy birthday, sister. You are so special in my life, not only for being my family, but also for being one of my best friends. Without you I would have not made this far.
156. A sister is the kind of special friend you search high and low to have, but she's standing alongside you since the very start.
157. You brighten my day and my life. What a joy it's been to grow up together.
158. You know who is my best friend in the world? It’s you, sis. Happy birthday!
159. You are the most thoughtful, dependable and caring person I know. How did I get so lucky to have you as my sister? Happy birthday, beautiful!
160. Sisters help you find important things when you have lost them. Things like smiles, your hopes, and your courage.