Supplement to the

Fidelity Advisor Mega Cap Stock Fund

Class A, Class T, Class B, Class C, and Institutional Class

Classes of Fidelity^® Mega Cap Stock Fund

(formerly Fidelity Growth & Income II Portfolio)

A Fund of Fidelity Hastings Street Trust

STATEMENT OF ADDITIONAL INFORMATION

August 29, 2008

<R>The following information supplements similar information found in the "Buying, Selling, and Exchanging Information" section beginning on page 17.</R>

<R>In addition to the exchange privileges listed in the fund's prospectus, the fund offers the privilege of moving between certain share classes of the same fund, as detailed below. Such transactions are subject to minimum investment limitations and other eligibility requirements of the applicable class of shares of a fund, and may be subject to applicable sales loads. An exchange between share classes of the same fund generally is a non-taxable event.</R>

<R>Class A: Shares of Class A may be exchanged for shares of the same Fidelity Advisor Fund: Institutional Class.</R>

<R>Class T: Shares of Class T may be exchanged for shares of the same Fidelity Advisor Fund: Class A (on a load-waived basis) or Institutional Class.</R>

<R>Shares of Class B may be exchanged for shares of the same Fidelity Advisor Fund: Class A, Class T, or Institutional Class.</R>

<R>Class C: Shares of Class C may be exchanged for shares of the same Fidelity Advisor Fund: Class A, Class T, or Institutional Class.</R>

<R>Institutional Class: Shares of Institutional Class may be exchanged for shares of the same Fidelity Advisor Fund: Class A if you are no longer eligible for Institutional Class.</R>

<R>The fund may terminate or modify its exchange privileges in the future.</R>

The following information supplements similar information found in the "Management Contract" section beginning on page 27.

Sub-Advisers - FMR H.K. and FMR Japan. On behalf of the fund, FMR has entered into sub-advisory agreements with FMR H.K. and FMR Japan. Pursuant to the sub-advisory agreements, FMR may receive from the sub-advisers investment research and advice on issuers outside the United States (non-discretionary services) and FMR may grant the sub-advisers investment management authority and the authority to buy and sell securities if FMR believes it would be beneficial to the fund (discretionary services). FMR, and not the fund, pays the sub-advisers.

<R>AGII/AGIIIB-09-01 March 25, 2009
1.881212.101</R>