Rihanna celebrated her 25 birthday on Wednesday in Hawaii with Chris Brown and shared pictures on twitter.

Rihanna tweeted an old photo with her beau Chris Brown that they had taken five years ago.

She wrote as the caption, "#throwbackRiRi my surprise 20^th birthday party!! Im an old b---ch now! Thank God for His gifts and His endless mercies! #25 #MilestoneLife."

Rihanna released the birthday tweets from Hawaii, where she is vacationing with Brown. Photographs were released yesterday of the two of them.  Rihanna wore a thong under fishnet tights, and Chris Brown wore a casual t-shirt and shorts.

Rihanna's most recent single, "Stay" is in its second week on the Billboard Hot 100 chart. The song features Mikky Ekko, and has landed Rihanna her 24^th top 10 hit.

This milestone surpasses the late Whitney Houston, who Rihanna was tied with after her previous single "Diamonds" bumped her top-10-song count up to 23.

Rihanna now is ranked third for having the most top-10 singles, and is drawing ever closer to the top.

Madonna, followed by Mariah Carey and Janet Jackson - tied at 27, holds the top rank on the list of most top-10 hits.