Britney Spears has heaped praise on little sister Jamie Lynn after viewing the 22 year old's new video for her first single How Could I Want More on Tuesday (26Nov13). The proud big sister took to Twitter.com to gush about the young mum's new promo hours after it was posted online, insisting Jamie Lynn looked "beautiful". Britney wrote, "Can’t believe how beautiful my sister looks in her #HowCouldIWantMore video. OMG!" Jamie Lynn responded with her own post, which read: "@britneyspears thanks for the support B!! I love you!" Fans of the singing sisters are in for a treat next week (02Dec13) when Britney's new album Britney Jean, which features a duet with Jamie Lynn, is released.