Britney's little sister spotted with diamond solitaire

Jamie Lynn Spears appears to be wearing her engagement ring on the wrong hand.

The pregnant 16-year-old accepted a marriage proposal from boyfriend Casey Aldridge earlier this week.

But on Tuesday she was snapped as she nipped out to the shops in LA – and was wearing the sparkler on her right hand, reports E! Online.

Jamie Lynn is due to give birth in the summer.

It is unknown whether she will marry Casey, 18, before or after the baby is born.

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Alison Adey