Is it just me, or did Lady Gaga rip off David Bowie?

Now, don't get me wrong I like her music and think she has an amazing voice. But at the same time, it seems to me that she may have ripped off David Bowie. My reasoning for this is clearly in her song's titles. Hence, her song titled "The Fame", David Bowie's song "Fame", "Just Dance" his song, "Let's Dance", and "Fashion", with his song also titled "Fashion". Seems more of just a coincidence to me, but I would like to see what you all think!